diff --git a/pandas/core/common.py b/pandas/core/common.py
index ddacb98a2ddf3..fc08ae6ac5153 100644
--- a/pandas/core/common.py
+++ b/pandas/core/common.py
@@ -4,24 +4,21 @@
 
 import itertools
 import re
-from datetime import datetime
+import codecs
+import csv
 
 from numpy.lib.format import read_array, write_array
 import numpy as np
-
 import pandas.algos as algos
 import pandas.lib as lib
 import pandas.tslib as tslib
 
 from pandas.util import py3compat
-import codecs
-import csv
-
 from pandas.util.py3compat import StringIO, BytesIO
-
 from pandas.core.config import get_option
 from pandas.core import array as pa
 
+
 # XXX: HACK for NumPy 1.5.1 to suppress warnings
 try:
     np.seterr(all='ignore')
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 401a7746953cb..f3d57da917293 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -22,13 +22,15 @@
 from numpy import nan as NA
 import numpy as np
 import numpy.ma as ma
+import pandas.lib as lib
+import pandas.algos as _algos
 
 from pandas.core.common import (isnull, notnull, PandasError, _try_sort,
                                 _default_index, _maybe_upcast, _is_sequence,
                                 _infer_dtype_from_scalar)
 from pandas.core.generic import NDFrame
 from pandas.core.index import Index, MultiIndex, _ensure_index
-from pandas.core.indexing import (_NDFrameIndexer, _maybe_droplevels,
+from pandas.core.indexing import (_maybe_droplevels,
                                   _convert_to_index_sliceable, _check_bool_indexer,
                                   _maybe_convert_indices)
 from pandas.core.internals import (BlockManager,
@@ -39,25 +41,18 @@
 from pandas.compat.scipy import scoreatpercentile as _quantile
 from pandas.util.compat import OrderedDict
 from pandas.util import py3compat
-from pandas.util.terminal import get_terminal_size
 from pandas.util.decorators import deprecate, Appender, Substitution
-
 from pandas.tseries.period import PeriodIndex
 from pandas.tseries.index import DatetimeIndex
-
 import pandas.core.algorithms as algos
 import pandas.core.datetools as datetools
 import pandas.core.common as com
 import pandas.core.format as fmt
 import pandas.core.generic as generic
 import pandas.core.nanops as nanops
-
-import pandas.lib as lib
-import pandas.tslib as tslib
-import pandas.algos as _algos
-
 from pandas.core.config import get_option, set_option
 
+
 #----------------------------------------------------------------------
 # Docstring templates
 
diff --git a/pandas/core/groupby.py b/pandas/core/groupby.py
index cc0a2b7589bb6..58712b48e63c5 100644
--- a/pandas/core/groupby.py
+++ b/pandas/core/groupby.py
@@ -1,6 +1,10 @@
 from itertools import izip
 import types
+
 import numpy as np
+import pandas.lib as lib
+import pandas.algos as _algos
+import pandas.hashtable as _hash
 
 from pandas.core.base import PandasObject
 from pandas.core.categorical import Categorical
@@ -16,9 +20,6 @@
 import pandas.core.common as com
 from pandas.core.common import _possibly_downcast_to_dtype, notnull
 
-import pandas.lib as lib
-import pandas.algos as _algos
-import pandas.hashtable as _hash
 
 _agg_doc = """Aggregate using input function or dict of {column -> function}
 
diff --git a/pandas/core/indexing.py b/pandas/core/indexing.py
index 0237cfde3b561..13d8a353e9e3d 100644
--- a/pandas/core/indexing.py
+++ b/pandas/core/indexing.py
@@ -1,12 +1,11 @@
 # pylint: disable=W0223
 
-from datetime import datetime
+import numpy as np
+
 from pandas.core.common import _asarray_tuplesafe
 from pandas.core.index import Index, MultiIndex, _ensure_index
 import pandas.core.common as com
-import pandas.lib as lib
 
-import numpy as np
 
 # the supported indexers
 def get_indexers_list():
diff --git a/pandas/core/internals.py b/pandas/core/internals.py
index f23a89635aaf2..3d1d0cc1416c5 100644
--- a/pandas/core/internals.py
+++ b/pandas/core/internals.py
@@ -4,21 +4,19 @@
 
 from numpy import nan
 import numpy as np
-from pandas.core.base import PandasObject
+import pandas.lib as lib
+import pandas.tslib as tslib
+from pandas.tslib import Timestamp
 
+from pandas.core.base import PandasObject
 from pandas.core.common import (_possibly_downcast_to_dtype, isnull, _NS_DTYPE,
                                 _TD_DTYPE)
 from pandas.core.index import (Index, MultiIndex, _ensure_index,
                                _handle_legacy_indexes)
 from pandas.core.indexing import _check_slice_bounds, _maybe_convert_indices
 import pandas.core.common as com
-import pandas.lib as lib
-import pandas.tslib as tslib
 import pandas.core.expressions as expressions
 
-from pandas.tslib import Timestamp
-from pandas.util import py3compat
-
 
 class Block(PandasObject):
     """
diff --git a/pandas/core/panel.py b/pandas/core/panel.py
index d33f7144c27b0..479d008cd6ac1 100644
--- a/pandas/core/panel.py
+++ b/pandas/core/panel.py
@@ -5,7 +5,10 @@
 
 import operator
 import sys
+
 import numpy as np
+import pandas.lib as lib
+
 from pandas.core.common import (PandasError, _mut_exclusive,
                                 _try_sort, _default_index,
                                 _infer_dtype_from_scalar,
@@ -24,7 +27,6 @@
 from pandas.util.decorators import deprecate, Appender, Substitution
 import pandas.core.common as com
 import pandas.core.nanops as nanops
-import pandas.lib as lib
 
 
 def _ensure_like_indices(time, panels):
diff --git a/pandas/core/reshape.py b/pandas/core/reshape.py
index cb34d0bad5df7..9c612870b7178 100644
--- a/pandas/core/reshape.py
+++ b/pandas/core/reshape.py
@@ -4,18 +4,17 @@
 import itertools
 
 import numpy as np
+import six
+import pandas.algos as algos
 
 from pandas.core.series import Series
 from pandas.core.frame import DataFrame
-
 from pandas.core.categorical import Categorical
 from pandas.core.common import (notnull, _ensure_platform_int, _maybe_promote,
                                 isnull)
 from pandas.core.groupby import (get_group_index, _compress_group_index,
                                  decons_group_index)
 import pandas.core.common as com
-import pandas.algos as algos
-
 from pandas.core.index import MultiIndex
 
 
diff --git a/pandas/core/series.py b/pandas/core/series.py
index b77dfbfd9618c..475a4dba4f352 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -13,6 +13,9 @@
 from numpy import nan, ndarray
 import numpy as np
 import numpy.ma as ma
+import pandas.lib as lib
+import pandas.tslib as tslib
+import pandas.index as _index
 
 from pandas.core.common import (isnull, notnull, _is_bool_indexer,
                                 _default_index, _maybe_promote, _maybe_upcast,
@@ -27,23 +30,17 @@
 from pandas.tseries.period import PeriodIndex, Period
 from pandas.util import py3compat
 from pandas.util.terminal import get_terminal_size
-
 import pandas.core.array as pa
-
 import pandas.core.common as com
 import pandas.core.datetools as datetools
 import pandas.core.format as fmt
 import pandas.core.generic as generic
 import pandas.core.nanops as nanops
 from pandas.util.decorators import Appender, Substitution, cache_readonly
-
-import pandas.lib as lib
-import pandas.tslib as tslib
-import pandas.index as _index
-
 from pandas.compat.scipy import scoreatpercentile as _quantile
 from pandas.core.config import get_option
 
+
 __all__ = ['Series', 'TimeSeries']
 
 _np_version = np.version.short_version
diff --git a/pandas/core/strings.py b/pandas/core/strings.py
index 1aa7fe87903d7..88c6ec9e2c568 100644
--- a/pandas/core/strings.py
+++ b/pandas/core/strings.py
@@ -1,10 +1,11 @@
+from itertools import izip
+import re
+
 import numpy as np
+import pandas.lib as lib
 
-from itertools import izip
 from pandas.core.common import isnull
 from pandas.core.series import Series
-import re
-import pandas.lib as lib
 
 
 def _get_array_list(arr, others):
diff --git a/pandas/io/ga.py b/pandas/io/ga.py
index 7d6277e2d45f9..b2ac8d8bd00eb 100644
--- a/pandas/io/ga.py
+++ b/pandas/io/ga.py
@@ -9,8 +9,6 @@
 from pandas import DataFrame
 import pandas as pd
 import pandas.io.parsers as psr
-import pandas.lib as lib
-from pandas.io.date_converters import generic_parser
 import pandas.io.auth as auth
 from pandas.util.decorators import Appender, Substitution
 
diff --git a/pandas/io/json.py b/pandas/io/json.py
index ce95c3394ce2c..83f680883841b 100644
--- a/pandas/io/json.py
+++ b/pandas/io/json.py
@@ -1,17 +1,16 @@
 
 # pylint: disable-msg=E1101,W0613,W0603
-from StringIO import StringIO
 import os
 
+import pandas.json as _json
+
 from pandas import Series, DataFrame, to_datetime
 from pandas.io.common import get_filepath_or_buffer
-import pandas.json as _json
 loads = _json.loads
 dumps = _json.dumps
 
 import numpy as np
 from pandas.tslib import iNaT
-import pandas.lib as lib
 
 ### interface to/from ###
 
diff --git a/pandas/io/parsers.py b/pandas/io/parsers.py
index 3bcfb66d32092..8d85df54e4378 100644
--- a/pandas/io/parsers.py
+++ b/pandas/io/parsers.py
@@ -6,23 +6,21 @@
 from itertools import izip
 import csv
 from warnings import warn
+import datetime
 
 import numpy as np
+import pandas.lib as lib
+import pandas.tslib as tslib
+import pandas.parser as _parser
 
 from pandas.core.index import Index, MultiIndex
 from pandas.core.frame import DataFrame
-import datetime
 import pandas.core.common as com
 from pandas.util import py3compat
 from pandas.io.date_converters import generic_parser
 from pandas.io.common import get_filepath_or_buffer
-
 from pandas.util.decorators import Appender
 
-import pandas.lib as lib
-import pandas.tslib as tslib
-import pandas.parser as _parser
-from pandas.tseries.period import Period
 
 _parser_params = """Also supports optionally iterating or breaking of the file
 into chunks.
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index 3c08213bf26d1..2465ef21a3986 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -10,8 +10,13 @@
 import copy
 import itertools
 import warnings
+from contextlib import contextmanager
 
 import numpy as np
+import pandas.lib as lib
+import pandas.algos as algos
+import pandas.tslib as tslib
+
 from pandas import (Series, TimeSeries, DataFrame, Panel, Panel4D, Index,
                     MultiIndex, Int64Index, Timestamp)
 from pandas.sparse.api import SparseSeries, SparseDataFrame, SparsePanel
@@ -30,11 +35,6 @@
 from pandas.util import py3compat
 from pandas.io.common import PerformanceWarning
 
-import pandas.lib as lib
-import pandas.algos as algos
-import pandas.tslib as tslib
-
-from contextlib import contextmanager
 
 # versioning attribute
 _version = '0.10.1'
diff --git a/pandas/io/sql.py b/pandas/io/sql.py
index 11b139b620175..31d3fa68a9a87 100644
--- a/pandas/io/sql.py
+++ b/pandas/io/sql.py
@@ -2,10 +2,10 @@
 Collection of query wrappers / abstractions to both facilitate data
 retrieval and to reduce dependency on DB-specific API.
 """
-from datetime import datetime, date
+from datetime import datetime
+import traceback
 
 import numpy as np
-import traceback
 
 from pandas.core.datetools import format as date_format
 from pandas.core.api import DataFrame, isnull
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index 9257338cd4913..3033d023060ed 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -10,16 +10,16 @@
 http://statsmodels.sourceforge.net/devel/
 """
 
-from StringIO import StringIO
-import numpy as np
-
 import sys
 import struct
+import datetime
+
+import numpy as np
+
 from pandas.core.base import StringMixin
 from pandas.core.frame import DataFrame
 from pandas.core.series import Series
 from pandas.core.categorical import Categorical
-import datetime
 from pandas.util import py3compat
 from pandas import isnull
 from pandas.io.parsers import _parser_params, Appender
diff --git a/pandas/io/tests/generate_legacy_pickles.py b/pandas/io/tests/generate_legacy_pickles.py
index 1838e0907233c..deaa2e6d6bb1b 100644
--- a/pandas/io/tests/generate_legacy_pickles.py
+++ b/pandas/io/tests/generate_legacy_pickles.py
@@ -36,7 +36,6 @@ def create_data():
     """ create the pickle data """
     
     import numpy as np
-    import pandas
     from pandas import (Series,DataFrame,Panel,
                         SparseSeries,SparseDataFrame,SparsePanel,
                         Index,MultiIndex,PeriodIndex,
@@ -82,9 +81,7 @@ def write_legacy_pickles():
     sys.path.insert(0,'.')
 
     import os
-    import numpy as np
     import pandas
-    import pandas.util.testing as tm
     import platform as pl
     import cPickle as pickle
 
diff --git a/pandas/io/tests/test_cparser.py b/pandas/io/tests/test_cparser.py
index 7fa8d06f48ea3..954c2eb3798a5 100644
--- a/pandas/io/tests/test_cparser.py
+++ b/pandas/io/tests/test_cparser.py
@@ -2,34 +2,18 @@
 C/Cython ascii file parser tests
 """
 
-from pandas.util.py3compat import StringIO, BytesIO
-from datetime import datetime
-import csv
 import os
 import sys
-import re
 import unittest
 
 import nose
-
-from numpy import nan
 import numpy as np
-
-from pandas import DataFrame, Series, Index, isnull, MultiIndex
-import pandas.io.parsers as parsers
-from pandas.io.parsers import (read_csv, read_table, read_fwf,
-                               TextParser)
-from pandas.util.testing import (assert_almost_equal, assert_frame_equal,
-                                 assert_series_equal, network)
-import pandas.lib as lib
-from pandas.util import py3compat
-from pandas.lib import Timestamp
-
-import pandas.util.testing as tm
-
 from pandas.parser import TextReader
 import pandas.parser as parser
 
+from pandas.util.py3compat import StringIO, BytesIO
+import pandas.util.testing as tm
+
 
 class TestCParser(unittest.TestCase):
 
diff --git a/pandas/io/tests/test_data.py b/pandas/io/tests/test_data.py
index 849f79afe3855..f53d079d3ea8c 100644
--- a/pandas/io/tests/test_data.py
+++ b/pandas/io/tests/test_data.py
@@ -1,10 +1,12 @@
 import unittest
 import warnings
-import nose
-from nose.tools import assert_equal
 from datetime import datetime
 
+import nose
+from nose.tools import assert_equal
 import numpy as np
+from numpy.testing import assert_array_equal
+
 import pandas as pd
 from pandas import DataFrame
 from pandas.io import data as web
diff --git a/pandas/io/tests/test_date_converters.py b/pandas/io/tests/test_date_converters.py
index 396912c0f5f54..23669d2a412a9 100644
--- a/pandas/io/tests/test_date_converters.py
+++ b/pandas/io/tests/test_date_converters.py
@@ -1,26 +1,11 @@
-from pandas.util.py3compat import StringIO, BytesIO
 from datetime import date, datetime
-import csv
-import os
-import sys
-import re
 import unittest
 
 import nose
-
-from numpy import nan
 import numpy as np
-from numpy.testing.decorators import slow
-
-from pandas import DataFrame, Series, Index, isnull
-import pandas.io.parsers as parsers
-from pandas.io.parsers import (read_csv, read_table, read_fwf,
-                               TextParser)
-from pandas.util.testing import (assert_almost_equal, assert_frame_equal,
-                                 assert_series_equal, network)
-import pandas.lib as lib
-from pandas.util import py3compat
-from pandas.lib import Timestamp
+
+from pandas.util.py3compat import StringIO
+from pandas.io.parsers import (read_csv, read_table )
 import pandas.io.date_converters as conv
 
 
diff --git a/pandas/io/tests/test_excel.py b/pandas/io/tests/test_excel.py
index baf6966530772..c5e0042827449 100644
--- a/pandas/io/tests/test_excel.py
+++ b/pandas/io/tests/test_excel.py
@@ -1,12 +1,6 @@
 # pylint: disable=E1101
 
-from pandas.util.py3compat import StringIO, BytesIO, PY3
-from datetime import datetime
-from os.path import split as psplit
-import csv
 import os
-import sys
-import re
 import unittest
 
 import nose
@@ -15,26 +9,12 @@
 import numpy as np
 
 from pandas import DataFrame, Series, Index, MultiIndex, DatetimeIndex
-import pandas.io.parsers as parsers
-from pandas.io.parsers import (read_csv, read_table, read_fwf,
-                                TextParser, TextFileReader)
+from pandas.io.parsers import (read_csv )
 from pandas.io.excel import ExcelFile, ExcelWriter, read_excel
-from pandas.util.testing import (assert_almost_equal,
-                                 assert_series_equal,
-                                 network,
-                                 ensure_clean)
+from pandas.util.testing import (  ensure_clean)
 import pandas.util.testing as tm
 import pandas as pd
 
-import pandas.lib as lib
-from pandas.util import py3compat
-from pandas.lib import Timestamp
-from pandas.tseries.index import date_range
-import pandas.tseries.tools as tools
-
-from numpy.testing.decorators import slow
-
-from pandas.parser import OverflowError
 
 def _skip_if_no_xlrd():
     try:
diff --git a/pandas/io/tests/test_ga.py b/pandas/io/tests/test_ga.py
index d2061a6d0b57a..351f4a8239cd5 100644
--- a/pandas/io/tests/test_ga.py
+++ b/pandas/io/tests/test_ga.py
@@ -3,10 +3,12 @@
 from datetime import datetime
 
 import nose
+from numpy.testing.decorators import slow
+
 import pandas as pd
 from pandas import DataFrame
 from pandas.util.testing import network, assert_frame_equal, with_connectivity_check
-from numpy.testing.decorators import slow
+
 
 try:
     import httplib2
diff --git a/pandas/io/tests/test_json/test_pandas.py b/pandas/io/tests/test_json/test_pandas.py
index bc6ba1a45136c..5232a382e529d 100644
--- a/pandas/io/tests/test_json/test_pandas.py
+++ b/pandas/io/tests/test_json/test_pandas.py
@@ -1,11 +1,6 @@
 
 # pylint: disable-msg=W0612,E1101
-from copy import deepcopy
-from datetime import datetime, timedelta
 from StringIO import StringIO
-import cPickle as pickle
-import operator
-import os
 import unittest
 
 import nose
diff --git a/pandas/io/tests/test_json/test_ujson.py b/pandas/io/tests/test_json/test_ujson.py
index 19c482d8b3590..ced5fd91021dc 100644
--- a/pandas/io/tests/test_json/test_ujson.py
+++ b/pandas/io/tests/test_json/test_ujson.py
@@ -1,5 +1,4 @@
-import unittest
-from unittest import TestCase
+from unittest import TestCase
 
 import pandas.json as ujson
 try:
@@ -10,18 +9,13 @@
 import nose
 import platform
 import sys
-import time
-import datetime
-import calendar
 import StringIO
 import re
-import random
 import decimal
 from functools import partial
 import pandas.util.py3compat as py3compat
 
 import numpy as np
-from pandas.util.testing import assert_almost_equal
 from numpy.testing import (assert_array_equal,
                            assert_array_almost_equal_nulp,
                            assert_approx_equal)
diff --git a/pandas/io/tests/test_parsers.py b/pandas/io/tests/test_parsers.py
index 784d650a524a7..8d8c1fe90009a 100644
--- a/pandas/io/tests/test_parsers.py
+++ b/pandas/io/tests/test_parsers.py
@@ -1,6 +1,5 @@
 # pylint: disable=E1101
 
-from pandas.util.py3compat import StringIO, BytesIO, PY3
 from datetime import datetime
 import csv
 import os
@@ -11,10 +10,14 @@
 from urllib2 import urlopen
 
 import nose
-
 from numpy import nan
 import numpy as np
+import pandas.lib as lib
+from pandas.lib import Timestamp
+from numpy.testing.decorators import slow
+from pandas.parser import OverflowError
 
+from pandas.util.py3compat import StringIO, BytesIO, PY3
 from pandas import DataFrame, Series, Index, MultiIndex, DatetimeIndex
 import pandas.io.parsers as parsers
 from pandas.io.parsers import (read_csv, read_table, read_fwf,
@@ -26,17 +29,10 @@
                                  ensure_clean)
 import pandas.util.testing as tm
 import pandas as pd
-
-import pandas.lib as lib
 from pandas.util import py3compat
-from pandas.lib import Timestamp
 from pandas.tseries.index import date_range
 import pandas.tseries.tools as tools
 
-from numpy.testing.decorators import slow
-
-from pandas.parser import OverflowError
-
 
 class ParserTests(object):
     """
diff --git a/pandas/io/tests/test_pickle.py b/pandas/io/tests/test_pickle.py
index 5c79c57c1e020..46ce44e165389 100644
--- a/pandas/io/tests/test_pickle.py
+++ b/pandas/io/tests/test_pickle.py
@@ -2,21 +2,19 @@
 
 """ manage legacy pickle tests """
 
-from datetime import datetime, timedelta
-import operator
 import pickle
 import unittest
-import nose
 import os
 
-import numpy as np
+import nose
+
 import pandas.util.testing as tm
-import pandas as pd
 from pandas import Index
 from pandas.sparse.tests import test_sparse
 from pandas.util import py3compat
 from pandas.util.misc import is_little_endian
 
+
 class TestPickle(unittest.TestCase):
     _multiprocess_can_split_ = True
 
diff --git a/pandas/io/tests/test_pytables.py b/pandas/io/tests/test_pytables.py
index 00d8089ad2ee7..4d8ea794a2389 100644
--- a/pandas/io/tests/test_pytables.py
+++ b/pandas/io/tests/test_pytables.py
@@ -1,10 +1,9 @@
-import nose
 import unittest
-import os
 import sys
 import warnings
-
 import datetime
+
+import nose
 import numpy as np
 
 import pandas
@@ -19,7 +18,6 @@
 from pandas import concat, Timestamp
 from pandas.util import py3compat
 
-from numpy.testing.decorators import slow
 
 try:
     import tables
diff --git a/pandas/io/tests/test_sql.py b/pandas/io/tests/test_sql.py
index 5b23bf173ec4e..e03c380a48466 100644
--- a/pandas/io/tests/test_sql.py
+++ b/pandas/io/tests/test_sql.py
@@ -1,22 +1,20 @@
 from __future__ import with_statement
-from pandas.util.py3compat import StringIO
 import unittest
 import sqlite3
 import sys
-
 import warnings
+from datetime import datetime
 
 import nose
-
 import numpy as np
 
+from pandas.util.py3compat import StringIO
 from pandas.core.datetools import format as date_format
 from pandas.core.api import DataFrame, isnull
-
 import pandas.io.sql as sql
 import pandas.util.testing as tm
 from pandas import Series, Index, DataFrame
-from datetime import datetime
+
 
 _formatters = {
     datetime: lambda dt: "'%s'" % date_format(dt),
diff --git a/pandas/io/tests/test_stata.py b/pandas/io/tests/test_stata.py
index fa8bf6f80ad03..9955ff138cae7 100644
--- a/pandas/io/tests/test_stata.py
+++ b/pandas/io/tests/test_stata.py
@@ -10,7 +10,7 @@
 
 from pandas.core.frame import DataFrame, Series
 from pandas.io.parsers import read_csv
-from pandas.io.stata import read_stata, StataReader, StataWriter
+from pandas.io.stata import read_stata, StataReader
 import pandas.util.testing as tm
 from pandas.util.testing import ensure_clean
 from pandas.util.misc import is_little_endian
diff --git a/pandas/io/tests/test_wb.py b/pandas/io/tests/test_wb.py
index 46eeabaf1e209..013aad1c9f8c9 100644
--- a/pandas/io/tests/test_wb.py
+++ b/pandas/io/tests/test_wb.py
@@ -1,9 +1,9 @@
 import nose
+from numpy.testing.decorators import slow
 
 import pandas
 from pandas.util.testing import network
 from pandas.util.testing import assert_frame_equal
-from numpy.testing.decorators import slow
 from pandas.io.wb import search, download
 
 
diff --git a/pandas/io/wb.py b/pandas/io/wb.py
index 4d83337a9062e..0a86fd3afb365 100644
--- a/pandas/io/wb.py
+++ b/pandas/io/wb.py
@@ -1,9 +1,11 @@
 from urllib2 import urlopen
-import json
 from contextlib import closing
-import pandas
+
 import numpy as np
 
+import json
+import pandas
+
 
 def download(country=['MX', 'CA', 'US'], indicator=['GDPPCKD', 'GDPPCKN'],
              start=2003, end=2005):
diff --git a/pandas/sparse/array.py b/pandas/sparse/array.py
index 48fa9caa0a05c..26b267cdd60ab 100644
--- a/pandas/sparse/array.py
+++ b/pandas/sparse/array.py
@@ -4,20 +4,18 @@
 
 # pylint: disable=E1101,E1103,W0231
 
+import operator
+
 from numpy import nan, ndarray
 import numpy as np
+from pandas._sparse import BlockIndex, IntIndex
+import pandas._sparse as splib
+import pandas.index as _index
 
-import operator
 from pandas.core.base import PandasObject
 import pandas.core.common as com
-
 from pandas.util import py3compat
 
-from pandas._sparse import BlockIndex, IntIndex
-import pandas._sparse as splib
-import pandas.lib as lib
-import pandas.index as _index
-
 
 def _sparse_op_wrap(op, name):
     """
diff --git a/pandas/sparse/frame.py b/pandas/sparse/frame.py
index f5e57efdcb166..96e576ed72f1c 100644
--- a/pandas/sparse/frame.py
+++ b/pandas/sparse/frame.py
@@ -8,7 +8,7 @@
 from numpy import nan
 import numpy as np
 
-from pandas.core.common import _pickle_array, _unpickle_array, _try_sort
+from pandas.core.common import _unpickle_array, _try_sort
 from pandas.core.index import Index, MultiIndex, _ensure_index
 from pandas.core.indexing import _check_slice_bounds, _maybe_convert_indices
 from pandas.core.series import Series
@@ -16,11 +16,9 @@
                                _default_index)
 from pandas.util.decorators import cache_readonly
 import pandas.core.common as com
-import pandas.core.datetools as datetools
 
 from pandas.sparse.series import SparseSeries
 from pandas.util.decorators import Appender
-import pandas.lib as lib
 
 
 class _SparseMockBlockManager(object):
diff --git a/pandas/sparse/list.py b/pandas/sparse/list.py
index ceb03eae5d282..2515e2250c7b6 100644
--- a/pandas/sparse/list.py
+++ b/pandas/sparse/list.py
@@ -1,9 +1,9 @@
 import numpy as np
+import pandas._sparse as splib
+
 from pandas.core.base import PandasObject
 from pandas.core.common import pprint_thing
-
 from pandas.sparse.array import SparseArray
-import pandas._sparse as splib
 
 
 class SparseList(PandasObject):
diff --git a/pandas/sparse/series.py b/pandas/sparse/series.py
index 802808954c8f4..05217109c6d4c 100644
--- a/pandas/sparse/series.py
+++ b/pandas/sparse/series.py
@@ -5,26 +5,23 @@
 
 # pylint: disable=E1101,E1103,W0231
 
+import operator
+
 from numpy import nan, ndarray
 import numpy as np
-
-import operator
+from pandas._sparse import BlockIndex, IntIndex
+import pandas._sparse as splib
 
 from pandas.core.common import isnull
 from pandas.core.index import Index, _ensure_index
 from pandas.core.series import Series, TimeSeries, _maybe_match_name
 from pandas.core.frame import DataFrame
 import pandas.core.common as com
-import pandas.core.datetools as datetools
-
 from pandas.util import py3compat
-
 from pandas.sparse.array import (make_sparse, _sparse_array_op, SparseArray)
-from pandas._sparse import BlockIndex, IntIndex
-import pandas._sparse as splib
-
 from pandas.util.decorators import Appender
 
+
 #------------------------------------------------------------------------------
 # Wrapper function for Series arithmetic methods
 
diff --git a/pandas/sparse/tests/test_array.py b/pandas/sparse/tests/test_array.py
index a92170621f50d..1be704ab1b758 100644
--- a/pandas/sparse/tests/test_array.py
+++ b/pandas/sparse/tests/test_array.py
@@ -1,13 +1,11 @@
 import re
-from numpy import nan, ndarray
-import numpy as np
-
 import operator
 import pickle
 import unittest
 
-from pandas.core.series import Series
-from pandas.core.common import notnull
+from numpy import nan
+import numpy as np
+
 from pandas.sparse.api import SparseArray
 from pandas.util.testing import assert_almost_equal, assertRaisesRegexp
 
diff --git a/pandas/sparse/tests/test_libsparse.py b/pandas/sparse/tests/test_libsparse.py
index d31f919e2e84b..1edbe4f78a141 100644
--- a/pandas/sparse/tests/test_libsparse.py
+++ b/pandas/sparse/tests/test_libsparse.py
@@ -1,19 +1,14 @@
 from unittest import TestCase
-
-from pandas import Series
+import operator
 
 import nose
-from numpy import nan
 import numpy as np
-import operator
-from numpy.testing import assert_almost_equal, assert_equal
-
-from pandas.core.sparse import SparseSeries
-from pandas import DataFrame
-
+from numpy.testing import assert_equal
 from pandas._sparse import IntIndex, BlockIndex
 import pandas._sparse as splib
 
+from pandas import Series
+
 TEST_LENGTH = 20
 
 plain_case = dict(xloc=[0, 7, 15],
diff --git a/pandas/sparse/tests/test_sparse.py b/pandas/sparse/tests/test_sparse.py
index 1382a6a642aa3..d143f49421680 100644
--- a/pandas/sparse/tests/test_sparse.py
+++ b/pandas/sparse/tests/test_sparse.py
@@ -3,13 +3,12 @@
 from unittest import TestCase
 import cPickle as pickle
 import operator
-from datetime import datetime
 
 import nose
 
 from numpy import nan
 import numpy as np
-import pandas as pd
+
 dec = np.testing.dec
 
 from pandas.util.testing import (assert_almost_equal, assert_series_equal,
diff --git a/pandas/stats/fama_macbeth.py b/pandas/stats/fama_macbeth.py
index 967199c0bcf69..ace8459d2d8aa 100644
--- a/pandas/stats/fama_macbeth.py
+++ b/pandas/stats/fama_macbeth.py
@@ -1,8 +1,7 @@
-from pandas.core.base import StringMixin
-from pandas.util.py3compat import StringIO
-
 import numpy as np
 
+from pandas.core.base import StringMixin
+from pandas.util.py3compat import StringIO
 from pandas.core.api import Series, DataFrame
 import pandas.stats.common as common
 from pandas.util.decorators import cache_readonly
diff --git a/pandas/stats/misc.py b/pandas/stats/misc.py
index e81319cb79c94..fa5492bba671c 100644
--- a/pandas/stats/misc.py
+++ b/pandas/stats/misc.py
@@ -1,7 +1,7 @@
 from numpy import NaN
 import numpy as np
 
-from pandas.core.api import Series, DataFrame, isnull, notnull
+from pandas.core.api import Series, DataFrame
 from pandas.core.series import remove_na
 
 
diff --git a/pandas/stats/moments.py b/pandas/stats/moments.py
index b104c70da9494..912bea76f3c8d 100644
--- a/pandas/stats/moments.py
+++ b/pandas/stats/moments.py
@@ -3,16 +3,14 @@
 statistics implemented in Cython
 """
 from __future__ import division
-
 from functools import wraps
 
 from numpy import NaN
 import numpy as np
+import pandas.algos as algos
 
 from pandas.core.api import DataFrame, Series, Panel, notnull
-import pandas.algos as algos
 import pandas.core.common as com
-
 from pandas.util.decorators import Substitution, Appender
 
 __all__ = ['rolling_count', 'rolling_max', 'rolling_min',
diff --git a/pandas/stats/ols.py b/pandas/stats/ols.py
index 742d832a923d8..d29d618594f67 100644
--- a/pandas/stats/ols.py
+++ b/pandas/stats/ols.py
@@ -11,7 +11,6 @@
 
 from pandas.core.api import DataFrame, Series, isnull
 from pandas.core.base import StringMixin
-from pandas.core.common import _ensure_float64
 from pandas.core.index import MultiIndex
 from pandas.core.panel import Panel
 from pandas.util.decorators import cache_readonly
diff --git a/pandas/stats/tests/common.py b/pandas/stats/tests/common.py
index 2866a36bc435a..e8f946e48ea66 100644
--- a/pandas/stats/tests/common.py
+++ b/pandas/stats/tests/common.py
@@ -8,7 +8,7 @@
 import numpy as np
 
 from pandas import DataFrame, bdate_range
-from pandas.util.testing import assert_almost_equal  # imported in other tests
+
 N = 100
 K = 4
 
diff --git a/pandas/stats/tests/test_fama_macbeth.py b/pandas/stats/tests/test_fama_macbeth.py
index ef262cfaf44bb..2cca39b830497 100644
--- a/pandas/stats/tests/test_fama_macbeth.py
+++ b/pandas/stats/tests/test_fama_macbeth.py
@@ -1,8 +1,9 @@
+import numpy as np
+
 from pandas import DataFrame, Panel
 from pandas.stats.api import fama_macbeth
-from common import assert_almost_equal, BaseTest
-
-import numpy as np
+from pandas.util.testing import assert_almost_equal
+from common import BaseTest
 
 
 class TestFamaMacBeth(BaseTest):
diff --git a/pandas/stats/tests/test_math.py b/pandas/stats/tests/test_math.py
index 92dedb35f4512..7709a77e145c2 100644
--- a/pandas/stats/tests/test_math.py
+++ b/pandas/stats/tests/test_math.py
@@ -1,19 +1,15 @@
 import unittest
-import nose
-
 from datetime import datetime
+
+import nose
 from numpy.random import randn
 import numpy as np
 
 from pandas.core.api import Series, DataFrame, date_range
-from pandas.util.testing import assert_almost_equal
-import pandas.core.datetools as datetools
-import pandas.stats.moments as mom
-import pandas.util.testing as tm
 import pandas.stats.math as pmath
-import pandas.tests.test_series as ts
 from pandas import ols
 
+
 N, K = 100, 10
 
 _have_statsmodels = True
diff --git a/pandas/stats/tests/test_moments.py b/pandas/stats/tests/test_moments.py
index 88dfcaf5ce7ae..3e68cd65d4f57 100644
--- a/pandas/stats/tests/test_moments.py
+++ b/pandas/stats/tests/test_moments.py
@@ -1,9 +1,9 @@
 import unittest
-import nose
 import sys
 import functools
-
 from datetime import datetime
+
+import nose
 from numpy.random import randn
 import numpy as np
 
@@ -16,6 +16,7 @@
 import pandas.stats.moments as mom
 import pandas.util.testing as tm
 
+
 N, K = 100, 10
 
 
diff --git a/pandas/stats/tests/test_ols.py b/pandas/stats/tests/test_ols.py
index 88f9224e8975a..988ce5d1212c6 100644
--- a/pandas/stats/tests/test_ols.py
+++ b/pandas/stats/tests/test_ols.py
@@ -12,7 +12,7 @@
 import numpy as np
 from numpy.testing.decorators import slow
 
-from pandas import date_range, bdate_range
+from pandas import date_range
 from pandas.core.panel import Panel
 from pandas import DataFrame, Index, Series, notnull, datetools
 from pandas.stats.api import ols
diff --git a/pandas/stats/tests/test_var.py b/pandas/stats/tests/test_var.py
index cbaacd0e89b6e..8dfea563e8aa9 100644
--- a/pandas/stats/tests/test_var.py
+++ b/pandas/stats/tests/test_var.py
@@ -1,9 +1,9 @@
-from numpy.testing import run_module_suite, assert_equal, TestCase
-
-from pandas.util.testing import assert_almost_equal
+import unittest
 
+from numpy.testing import assert_equal, TestCase
 import nose
-import unittest
+
+from pandas.util.testing import assert_almost_equal
 
 raise nose.SkipTest('skipping this for now')
 
diff --git a/pandas/tests/test_categorical.py b/pandas/tests/test_categorical.py
index 48db7afa29aaa..f5be4b9eef136 100644
--- a/pandas/tests/test_categorical.py
+++ b/pandas/tests/test_categorical.py
@@ -8,9 +8,7 @@
 
 from pandas.core.api import value_counts
 from pandas.core.categorical import Categorical
-from pandas.core.index import Index, Int64Index, MultiIndex
 from pandas.core.frame import DataFrame
-from pandas.util.testing import assert_almost_equal
 import pandas.core.common as com
 
 import pandas.util.testing as tm
diff --git a/pandas/tests/test_common.py b/pandas/tests/test_common.py
index db01545fb3c9d..9b77476498d8d 100644
--- a/pandas/tests/test_common.py
+++ b/pandas/tests/test_common.py
@@ -1,9 +1,10 @@
 from datetime import datetime
-import sys
 import re
+import unittest
 
 import nose
-import unittest
+import numpy as np
+from pandas.tslib import iNaT
 
 from pandas import Series, DataFrame, date_range, DatetimeIndex
 from pandas.core.common import notnull, isnull
@@ -11,10 +12,6 @@
 import pandas.util.testing as tm
 import pandas.core.config as cf
 
-import numpy as np
-
-from pandas.tslib import iNaT
-from pandas.util import py3compat
 
 _multiprocess_can_split_ = True
 
diff --git a/pandas/tests/test_config.py b/pandas/tests/test_config.py
index a2b1ea43717cf..89238e40f6461 100644
--- a/pandas/tests/test_config.py
+++ b/pandas/tests/test_config.py
@@ -1,11 +1,13 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 from __future__ import with_statement  # support python 2.5
-import pandas as pd
 import unittest
 import warnings
+
 import nose
 
+import pandas as pd
+
 
 class TestConfig(unittest.TestCase):
     _multiprocess_can_split_ = True
diff --git a/pandas/tests/test_expressions.py b/pandas/tests/test_expressions.py
index ba0a9926dfa78..bd50b7d894442 100644
--- a/pandas/tests/test_expressions.py
+++ b/pandas/tests/test_expressions.py
@@ -1,27 +1,18 @@
 # pylint: disable-msg=W0612,E1101
 
 import unittest
-import nose
-
 import operator
-from numpy import random, nan
-from numpy.random import randn
+
+import nose
 import numpy as np
 from numpy.testing import assert_array_equal
 
-import pandas as pan
-from pandas.core.api import DataFrame, Series, notnull, isnull
+from pandas.core.api import DataFrame
 from pandas.core import expressions as expr
-
-from pandas.util.testing import (assert_almost_equal,
-                                 assert_series_equal,
+from pandas.util.testing import (assert_series_equal,
                                  assert_frame_equal)
 from pandas.util import py3compat
 
-import pandas.util.testing as tm
-import pandas.lib as lib
-
-from numpy.testing.decorators import slow
 
 if not expr._USE_NUMEXPR:
     raise nose.SkipTest
@@ -127,11 +118,11 @@ def testit():
                         result   = expr.evaluate(op, op_str, f, f, use_numexpr=True)
                         expected = expr.evaluate(op, op_str, f, f, use_numexpr=False)
                         assert_array_equal(result,expected.values)
-                
+
                         result   = expr._can_use_numexpr(op, op_str, f2, f2, 'evaluate')
                         self.assert_(result == False)
 
-        
+
         expr.set_use_numexpr(False)
         testit()
         expr.set_use_numexpr(True)
@@ -148,7 +139,7 @@ def testit():
 
                 f11 = f
                 f12 = f + 1
-            
+
                 f21 = f2
                 f22 = f2 + 1
 
@@ -162,7 +153,7 @@ def testit():
                     result   = expr.evaluate(op, op_str, f11, f12, use_numexpr=True)
                     expected = expr.evaluate(op, op_str, f11, f12, use_numexpr=False)
                     assert_array_equal(result,expected.values)
-                    
+
                     result   = expr._can_use_numexpr(op, op_str, f21, f22, 'evaluate')
                     self.assert_(result == False)
 
@@ -179,7 +170,7 @@ def test_where(self):
         def testit():
             for f in [ self.frame, self.frame2, self.mixed, self.mixed2 ]:
 
-                
+
                 for cond in [ True, False ]:
 
                     c = np.empty(f.shape,dtype=np.bool_)
diff --git a/pandas/tests/test_frame.py b/pandas/tests/test_frame.py
index a9df56a498f63..8e694af642b8c 100644
--- a/pandas/tests/test_frame.py
+++ b/pandas/tests/test_frame.py
@@ -6,13 +6,16 @@
 import operator
 import re
 import unittest
-import nose
 
+import nose
 from numpy import random, nan
 from numpy.random import randn
 import numpy as np
 import numpy.ma as ma
 from numpy.testing import assert_array_equal
+from pandas.parser import CParserError
+import pandas.lib as lib
+from numpy.testing.decorators import slow
 
 import pandas as pan
 import pandas.core.nanops as nanops
@@ -20,12 +23,10 @@
 import pandas.core.format as fmt
 import pandas.core.datetools as datetools
 from pandas.core.api import (DataFrame, Index, Series, notnull, isnull,
-                             MultiIndex, DatetimeIndex, Timestamp, Period)
+                             MultiIndex, DatetimeIndex, Timestamp)
 from pandas import date_range
 import pandas as pd
 from pandas.io.parsers import read_csv
-from pandas.parser import CParserError
-
 from pandas.util.testing import (assert_almost_equal,
                                  assert_series_equal,
                                  assert_frame_equal,
@@ -34,11 +35,8 @@
                                  ensure_clean)
 from pandas.util import py3compat
 from pandas.util.compat import OrderedDict
-
 import pandas.util.testing as tm
-import pandas.lib as lib
 
-from numpy.testing.decorators import slow
 
 def _skip_if_no_scipy():
     try:
@@ -3142,7 +3140,7 @@ def test_timedeltas(self):
 
     def test_operators_timedelta64(self):
 
-        from datetime import datetime, timedelta
+        from datetime import timedelta
         df = DataFrame(dict(A = date_range('2012-1-1', periods=3, freq='D'),
                             B = date_range('2012-1-2', periods=3, freq='D'),
                             C = Timestamp('20120101')-timedelta(minutes=5,seconds=5)))
@@ -6910,7 +6908,6 @@ def test_replace_mixed(self):
         assert_frame_equal(result,expected)
 
         # test case from
-        from pandas.util.testing import makeCustomDataframe as mkdf
         df = DataFrame({'A' : Series([3,0],dtype='int64'), 'B' : Series([0,3],dtype='int64') })
         result = df.replace(3, df.mean().to_dict())
         expected = df.copy().astype('float64')
@@ -8453,7 +8450,6 @@ def test_sort_index_inplace(self):
         assert_frame_equal(df, expected)
 
     def test_sort_index_different_sortorder(self):
-        import random
         A = np.arange(20).repeat(5)
         B = np.tile(np.arange(5), 20)
 
diff --git a/pandas/tests/test_graphics.py b/pandas/tests/test_graphics.py
index 1b7052bf62824..6d0acce3807bf 100644
--- a/pandas/tests/test_graphics.py
+++ b/pandas/tests/test_graphics.py
@@ -1,21 +1,18 @@
-import nose
 import os
 import string
 import unittest
-
 from datetime import datetime, date
 
-from pandas import Series, DataFrame, MultiIndex, PeriodIndex, date_range
-import pandas.util.testing as tm
-from pandas.util.testing import ensure_clean
-from pandas.core.config import set_option
-
-
+import nose
 import numpy as np
 from numpy import random
-
 from numpy.testing import assert_array_equal
 from numpy.testing.decorators import slow
+
+from pandas import Series, DataFrame, MultiIndex, PeriodIndex, date_range
+import pandas.util.testing as tm
+from pandas.util.testing import ensure_clean
+from pandas.core.config import set_option
 import pandas.tools.plotting as plotting
 
 
diff --git a/pandas/tests/test_groupby.py b/pandas/tests/test_groupby.py
index 6af287b77cbac..34c0de3391663 100644
--- a/pandas/tests/test_groupby.py
+++ b/pandas/tests/test_groupby.py
@@ -1,27 +1,23 @@
-import nose
 import unittest
-
 from datetime import datetime
+from collections import defaultdict
+
+import nose
 from numpy import nan
+import numpy as np
 
 from pandas import bdate_range
 from pandas.core.index import Index, MultiIndex
 from pandas.core.common import rands
 from pandas.core.api import Categorical, DataFrame
-from pandas.core.groupby import GroupByError, SpecificationError, DataError
+from pandas.core.groupby import SpecificationError, DataError
 from pandas.core.series import Series
 from pandas.util.testing import (assert_panel_equal, assert_frame_equal,
                                  assert_series_equal, assert_almost_equal)
 from pandas.core.panel import Panel
 from pandas.tools.merge import concat
-from collections import defaultdict
 import pandas.core.common as com
-import pandas.core.datetools as dt
-import numpy as np
-from numpy.testing import assert_equal
-
 import pandas.core.nanops as nanops
-
 import pandas.util.testing as tm
 
 
diff --git a/pandas/tests/test_index.py b/pandas/tests/test_index.py
index 250728dc59481..54fb1ba99c4a3 100644
--- a/pandas/tests/test_index.py
+++ b/pandas/tests/test_index.py
@@ -4,24 +4,21 @@
 import operator
 import pickle
 import unittest
-import nose
 import os
 
+import nose
 import numpy as np
 from numpy.testing import assert_array_equal
+from pandas.lib import Timestamp
 
 from pandas.core.index import Index, Int64Index, MultiIndex
 from pandas.util.testing import assert_almost_equal
 from pandas.util import py3compat
-
 import pandas.util.testing as tm
 import pandas.core.config as cf
-
 from pandas.tseries.index import _to_m8
 import pandas.tseries.offsets as offsets
-
 import pandas as pd
-from pandas.lib import Timestamp
 
 
 class TestIndex(unittest.TestCase):
diff --git a/pandas/tests/test_indexing.py b/pandas/tests/test_indexing.py
index f0ace52f2c2b5..684204e5f8671 100644
--- a/pandas/tests/test_indexing.py
+++ b/pandas/tests/test_indexing.py
@@ -1,26 +1,20 @@
 # pylint: disable-msg=W0612,E1101
 import unittest
-import nose
 import itertools
 from StringIO import StringIO
 
-from numpy import random, nan
+import nose
+from numpy import nan
 from numpy.random import randn
 import numpy as np
-from numpy.testing import assert_array_equal
 
 import pandas as pd
-import pandas.core.common as com
-from pandas.core.api import (DataFrame, Index, Series, Panel, notnull, isnull,
-                             MultiIndex, DatetimeIndex, Timestamp)
+from pandas.core.api import (DataFrame, Index, Series, Panel, MultiIndex, Timestamp)
 from pandas.util.testing import (assert_almost_equal, assert_series_equal,
                                  assert_frame_equal, assert_panel_equal)
-from pandas.util import py3compat
-
 import pandas.util.testing as tm
-import pandas.lib as lib
 from pandas import date_range
-from numpy.testing.decorators import slow
+
 
 _verbose = False
 
diff --git a/pandas/tests/test_internals.py b/pandas/tests/test_internals.py
index 0f3b8c1634416..f685e47d24a5d 100644
--- a/pandas/tests/test_internals.py
+++ b/pandas/tests/test_internals.py
@@ -6,7 +6,6 @@
 
 from pandas import Index, MultiIndex, DataFrame, Series
 from pandas.core.internals import *
-import pandas.core.internals as internals
 import pandas.util.testing as tm
 
 from pandas.util.testing import (
diff --git a/pandas/tests/test_multilevel.py b/pandas/tests/test_multilevel.py
index d852bad215f77..ac7c40459fa66 100644
--- a/pandas/tests/test_multilevel.py
+++ b/pandas/tests/test_multilevel.py
@@ -1,14 +1,14 @@
 # pylint: disable-msg=W0612,E1101,W0141
-from pandas.util.py3compat import StringIO
-import nose
 import unittest
 
+import nose
 from numpy.random import randn
 import numpy as np
+import pandas.index as _index
 
+from pandas.util.py3compat import StringIO
 from pandas.core.index import Index, MultiIndex
 from pandas import Panel, DataFrame, Series, notnull, isnull
-
 from pandas.util.testing import (assert_almost_equal,
                                  assert_series_equal,
                                  assert_frame_equal)
@@ -17,8 +17,6 @@
 from pandas.util.compat import product as cart_product
 import pandas as pd
 
-import pandas.index as _index
-
 
 class TestMultiLevel(unittest.TestCase):
 
diff --git a/pandas/tests/test_panel4d.py b/pandas/tests/test_panel4d.py
index 9c3a66c32c501..3017896d26c48 100644
--- a/pandas/tests/test_panel4d.py
+++ b/pandas/tests/test_panel4d.py
@@ -1,20 +1,17 @@
 from datetime import datetime
-import os
 import operator
 import unittest
 import nose
 
 import numpy as np
 
-from pandas import DataFrame, Index, isnull, notnull, pivot, MultiIndex
+from pandas import Index, isnull, notnull
 from pandas.core.datetools import bday
 from pandas.core.frame import group_agg
 from pandas.core.panel import Panel
 from pandas.core.panel4d import Panel4D
 from pandas.core.series import remove_na
 import pandas.core.common as com
-import pandas.core.panel as panelmod
-from pandas.util import py3compat
 
 from pandas.util.testing import (assert_panel_equal,
                                  assert_panel4d_equal,
diff --git a/pandas/tests/test_panelnd.py b/pandas/tests/test_panelnd.py
index 5675cfec58678..0c460e3e19583 100644
--- a/pandas/tests/test_panelnd.py
+++ b/pandas/tests/test_panelnd.py
@@ -1,21 +1,9 @@
-from datetime import datetime
-import os
-import operator
 import unittest
 import nose
 
-import numpy as np
-
 from pandas.core import panelnd
 from pandas.core.panel import Panel
-import pandas.core.common as com
-from pandas.util import py3compat
-
-from pandas.util.testing import (assert_panel_equal,
-                                 assert_panel4d_equal,
-                                 assert_frame_equal,
-                                 assert_series_equal,
-                                 assert_almost_equal)
+from pandas.util.testing import assert_panel_equal
 import pandas.util.testing as tm
 
 
diff --git a/pandas/tests/test_reshape.py b/pandas/tests/test_reshape.py
index b24e097238a70..4335d93fa8c50 100644
--- a/pandas/tests/test_reshape.py
+++ b/pandas/tests/test_reshape.py
@@ -1,20 +1,12 @@
 # pylint: disable-msg=W0612,E1101
-from copy import deepcopy
-from datetime import datetime, timedelta
-from StringIO import StringIO
-import cPickle as pickle
-import operator
-import os
 import unittest
 
 import nose
-
-from pandas import DataFrame
-import pandas as pd
-
 from numpy import nan
 import numpy as np
 
+from pandas import DataFrame
+import pandas as pd
 from pandas.core.reshape import melt, convert_dummies, lreshape
 import pandas.util.testing as tm
 
diff --git a/pandas/tests/test_rplot.py b/pandas/tests/test_rplot.py
index 0f429bf715688..964eae04f1d60 100644
--- a/pandas/tests/test_rplot.py
+++ b/pandas/tests/test_rplot.py
@@ -1,10 +1,11 @@
 import unittest
-import pandas.tools.rplot as rplot
-from pandas import read_csv
 import os
 
 import nose
 
+import pandas.tools.rplot as rplot
+from pandas import read_csv
+
 
 try:
     import matplotlib.pyplot as plt
diff --git a/pandas/tests/test_series.py b/pandas/tests/test_series.py
index cbf7fb070e97f..c2708f149581d 100644
--- a/pandas/tests/test_series.py
+++ b/pandas/tests/test_series.py
@@ -1,28 +1,24 @@
 # pylint: disable-msg=E1101,W0612
 
-from datetime import datetime, timedelta, date
-import os
+from datetime import datetime, timedelta
 import operator
 import unittest
 
 import nose
-
 from numpy import nan
 import numpy as np
 import numpy.ma as ma
-import pandas as pd
+import pandas.lib as lib
 
+import pandas as pd
 from pandas import (Index, Series, TimeSeries, DataFrame, isnull, notnull,
                     bdate_range, date_range)
 from pandas.core.index import MultiIndex
 from pandas.tseries.index import Timestamp, DatetimeIndex
 import pandas.core.config as cf
 import pandas.core.series as smod
-import pandas.lib as lib
-
 import pandas.core.datetools as datetools
 import pandas.core.nanops as nanops
-
 from pandas.util.py3compat import StringIO
 from pandas.util import py3compat
 from pandas.util.testing import (assert_series_equal,
@@ -3210,7 +3206,8 @@ def test_getitem_setitem_datetime_tz(self):
         assert_series_equal(result, ts)
 
     def test_getitem_setitem_periodindex(self):
-        from pandas import period_range, Period
+        from pandas import period_range
+
         N = 50
         rng = period_range('1/1/1990', periods=N, freq='H')
         ts = Series(np.random.randn(N), index=rng)
diff --git a/pandas/tests/test_stats.py b/pandas/tests/test_stats.py
index 0432d11aaa254..b12e5a9172e75 100644
--- a/pandas/tests/test_stats.py
+++ b/pandas/tests/test_stats.py
@@ -1,11 +1,10 @@
-import nose
 import unittest
 
+import nose
 from numpy import nan
 import numpy as np
 
 from pandas import Series, DataFrame
-
 from pandas.util.compat import product
 from pandas.util.testing import (assert_frame_equal,
                                  assert_series_equal,
diff --git a/pandas/tests/test_strings.py b/pandas/tests/test_strings.py
index d057dc5304277..366ff4b3ac631 100644
--- a/pandas/tests/test_strings.py
+++ b/pandas/tests/test_strings.py
@@ -1,8 +1,6 @@
 # pylint: disable-msg=E1101,W0612
 
-from datetime import datetime, timedelta, date
-import os
-import operator
+from datetime import datetime
 import re
 import unittest
 
@@ -13,11 +11,10 @@
 from numpy.testing import assert_array_equal
 from numpy.random import randint
 
-from pandas import (Index, Series, TimeSeries, DataFrame, isnull, notnull,
-                    bdate_range, date_range)
+from pandas import Series, isnull
 import pandas.core.common as com
 
-from pandas.util.testing import assert_series_equal, assert_almost_equal
+from pandas.util.testing import assert_series_equal
 import pandas.util.testing as tm
 
 import pandas.core.strings as strings
@@ -776,7 +773,6 @@ def test_get(self):
 
     def test_more_contains(self):
         # PR #1179
-        import re
 
         s = Series(['A', 'B', 'C', 'Aaba', 'Baca', '', NA,
                     'CABA', 'dog', 'cat'])
@@ -808,7 +804,6 @@ def test_more_contains(self):
 
     def test_more_replace(self):
         # PR #1179
-        import re
         s = Series(['A', 'B', 'C', 'Aaba', 'Baca',
                     '', NA, 'CABA', 'dog', 'cat'])
 
diff --git a/pandas/tests/test_tests.py b/pandas/tests/test_tests.py
index 89238187ce434..2c474a183940d 100644
--- a/pandas/tests/test_tests.py
+++ b/pandas/tests/test_tests.py
@@ -1,10 +1,7 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 from __future__ import with_statement  # support python 2.5
-import pandas as pd
 import unittest
-import warnings
-import nose
 
 from pandas.util.testing import assert_almost_equal
 
diff --git a/pandas/tests/test_tseries.py b/pandas/tests/test_tseries.py
index 54c00e798f08a..89b9416f45257 100644
--- a/pandas/tests/test_tseries.py
+++ b/pandas/tests/test_tseries.py
@@ -2,12 +2,11 @@
 
 from numpy import nan
 import numpy as np
-from pandas import Index, isnull, Timestamp
-from pandas.util.testing import assert_almost_equal
-import pandas.util.testing as common
 import pandas.lib as lib
 import pandas.algos as algos
-from datetime import datetime
+
+from pandas import Index, isnull, Timestamp
+from pandas.util.testing import assert_almost_equal
 
 
 class TestTseriesUtil(unittest.TestCase):
diff --git a/pandas/tools/merge.py b/pandas/tools/merge.py
index f96f3b98a0383..38560d6d6fec3 100644
--- a/pandas/tools/merge.py
+++ b/pandas/tools/merge.py
@@ -3,8 +3,13 @@
 """
 
 import itertools
-import numpy as np
 import types
+
+import numpy as np
+import pandas.lib as lib
+import pandas.algos as algos
+import pandas.hashtable as _hash
+
 from pandas.core.categorical import Categorical
 from pandas.core.frame import DataFrame, _merge_doc
 from pandas.core.generic import NDFrame
@@ -20,10 +25,6 @@
 from pandas.sparse.frame import SparseDataFrame
 import pandas.core.common as com
 
-import pandas.lib as lib
-import pandas.algos as algos
-import pandas.hashtable as _hash
-
 
 @Substitution('\nleft : DataFrame')
 @Appender(_merge_doc, indents=0)
diff --git a/pandas/tools/pivot.py b/pandas/tools/pivot.py
index 945f7fb4ab437..21be6424f5677 100644
--- a/pandas/tools/pivot.py
+++ b/pandas/tools/pivot.py
@@ -1,12 +1,12 @@
 # pylint: disable=E1103
 
+import numpy as np
+
 from pandas import Series, DataFrame
 from pandas.core.index import MultiIndex
-from pandas.core.reshape import _unstack_multiple
 from pandas.tools.merge import concat
 from pandas.tools.util import cartesian_product
 import pandas.core.common as com
-import numpy as np
 
 
 def pivot_table(data, values=None, rows=None, cols=None, aggfunc='mean',
diff --git a/pandas/tools/tests/test_merge.py b/pandas/tools/tests/test_merge.py
index b0261077fc767..7a3c61db26898 100644
--- a/pandas/tools/tests/test_merge.py
+++ b/pandas/tools/tests/test_merge.py
@@ -1,13 +1,14 @@
 # pylint: disable=E1103
 
-import nose
 import unittest
-
 from datetime import datetime
+
+import nose
 from numpy.random import randn
 from numpy import nan
 import numpy as np
 import random
+import pandas.algos as algos
 
 from pandas import *
 from pandas.tseries.index import DatetimeIndex
@@ -15,9 +16,9 @@
 from pandas.util.testing import (assert_frame_equal, assert_series_equal,
                                  assert_almost_equal, rands,
                                  makeCustomDataframe as mkdf)
-import pandas.algos as algos
 import pandas.util.testing as tm
 
+
 a_ = np.array
 
 N = 50
diff --git a/pandas/tools/tests/test_tile.py b/pandas/tools/tests/test_tile.py
index 7da9a3bb5a95a..5f05daa9b27cd 100644
--- a/pandas/tools/tests/test_tile.py
+++ b/pandas/tools/tests/test_tile.py
@@ -1,20 +1,18 @@
 import os
-import nose
 import unittest
 
+import nose
 import numpy as np
+from numpy.testing import assert_equal, assert_almost_equal
 
-from pandas import DataFrame, Series, unique
+from pandas import Series
 import pandas.util.testing as tm
 from pandas.util.testing import assertRaisesRegexp
 import pandas.core.common as com
-
 from pandas.core.algorithms import quantile
 from pandas.tools.tile import cut, qcut
 import pandas.tools.tile as tmod
 
-from numpy.testing import assert_equal, assert_almost_equal
-
 
 class TestCut(unittest.TestCase):
 
diff --git a/pandas/tools/tests/test_tools.py b/pandas/tools/tests/test_tools.py
index b57ff68c97e3d..c5feddc6b07dd 100644
--- a/pandas/tools/tests/test_tools.py
+++ b/pandas/tools/tests/test_tools.py
@@ -1,10 +1,10 @@
 # import unittest
 
+import numpy as np
+
 from pandas import DataFrame
 from pandas.tools.describe import value_range
 
-import numpy as np
-
 
 def test_value_range():
     df = DataFrame(np.random.randn(5, 5))
diff --git a/pandas/tools/tests/test_util.py b/pandas/tools/tests/test_util.py
index 1888f2ede35e0..eae17ba1924bf 100644
--- a/pandas/tools/tests/test_util.py
+++ b/pandas/tools/tests/test_util.py
@@ -1,12 +1,12 @@
-import os
-import nose
 import unittest
 
+import nose
 import numpy as np
 from numpy.testing import assert_equal
 
 from pandas.tools.util import cartesian_product
 
+
 class TestCartesianProduct(unittest.TestCase):
 
     def test_simple(self):
diff --git a/pandas/tools/tile.py b/pandas/tools/tile.py
index ffed6cafc1047..3255aecf74dc8 100644
--- a/pandas/tools/tile.py
+++ b/pandas/tools/tile.py
@@ -2,15 +2,14 @@
 Quantilization functions and related stuff
 """
 
-from pandas.core.api import DataFrame, Series
+import numpy as np
+
+from pandas.core.api import Series
 from pandas.core.categorical import Categorical
-from pandas.core.index import _ensure_index
 import pandas.core.algorithms as algos
 import pandas.core.common as com
 import pandas.core.nanops as nanops
 
-import numpy as np
-
 
 def cut(x, bins, right=True, labels=None, retbins=False, precision=3,
         include_lowest=False):
diff --git a/pandas/tools/util.py b/pandas/tools/util.py
index 1f2905b86f7d0..dfa037ae3ec86 100644
--- a/pandas/tools/util.py
+++ b/pandas/tools/util.py
@@ -1,6 +1,8 @@
-from pandas.core.index import Index
 import numpy as np
 
+from pandas.core.index import Index
+
+
 def match(needles, haystack):
     haystack = Index(haystack)
     needles = Index(needles)
diff --git a/pandas/tseries/frequencies.py b/pandas/tseries/frequencies.py
index 51b8e5d042ca9..7272d70df4712 100644
--- a/pandas/tseries/frequencies.py
+++ b/pandas/tseries/frequencies.py
@@ -2,14 +2,14 @@
 import re
 
 import numpy as np
+import pandas.lib as lib
+import pandas.tslib as tslib
 
 from pandas.core.algorithms import unique
 from pandas.tseries.offsets import DateOffset
 from pandas.util.decorators import cache_readonly
 import pandas.tseries.offsets as offsets
 import pandas.core.common as com
-import pandas.lib as lib
-import pandas.tslib as tslib
 
 
 class FreqGroup(object):
diff --git a/pandas/tseries/index.py b/pandas/tseries/index.py
index 9983f12bb29f0..ebab3c2a1bf8f 100644
--- a/pandas/tseries/index.py
+++ b/pandas/tseries/index.py
@@ -1,10 +1,14 @@
 # pylint: disable=E1101
 import operator
-
 from datetime import time, datetime
 from datetime import timedelta
 
 import numpy as np
+from pandas.lib import Timestamp
+import pandas.lib as lib
+import pandas.tslib as tslib
+import pandas.algos as _algos
+import pandas.index as _index
 
 from pandas.core.common import isnull, _NS_DTYPE, _INT64_DTYPE
 from pandas.core.index import Index, Int64Index
@@ -18,12 +22,6 @@
 import pandas.tseries.offsets as offsets
 import pandas.tseries.tools as tools
 
-from pandas.lib import Timestamp
-import pandas.lib as lib
-import pandas.tslib as tslib
-import pandas.algos as _algos
-import pandas.index as _index
-
 
 def _utc():
     import pytz
diff --git a/pandas/tseries/interval.py b/pandas/tseries/interval.py
index 104e088ee4e84..75c5cb7327e68 100644
--- a/pandas/tseries/interval.py
+++ b/pandas/tseries/interval.py
@@ -1,5 +1,3 @@
-import numpy as np
-
 from pandas.core.index import Index
 
 
diff --git a/pandas/tseries/period.py b/pandas/tseries/period.py
index 2db32b14e2eb3..9187c236792f9 100644
--- a/pandas/tseries/period.py
+++ b/pandas/tseries/period.py
@@ -1,26 +1,23 @@
 # pylint: disable=E1101,E1103,W0232
 import operator
-
 from datetime import datetime, date
+
 import numpy as np
-from pandas.core.base import PandasObject
+import pandas.lib as lib
+import pandas.tslib as tslib
+import pandas.algos as _algos
+import pandas.core.common as com
+import pandas.tseries.frequencies as _freq_mod
 
-import pandas.tseries.offsets as offsets
+from pandas.lib import Timestamp
+from pandas.core.base import PandasObject
 from pandas.tseries.frequencies import (get_freq_code as _gfc,
                                         _month_numbers, FreqGroup)
 from pandas.tseries.index import DatetimeIndex, Int64Index, Index
 from pandas.tseries.tools import parse_time_string
-import pandas.tseries.frequencies as _freq_mod
-
-import pandas.core.common as com
-from pandas.core.common import isnull, _NS_DTYPE, _INT64_DTYPE
+from pandas.core.common import isnull, _INT64_DTYPE
 from pandas.util import py3compat
 
-from pandas.lib import Timestamp
-import pandas.lib as lib
-import pandas.tslib as tslib
-import pandas.algos as _algos
-
 
 #---------------
 # Period logic
diff --git a/pandas/tseries/plotting.py b/pandas/tseries/plotting.py
index ae32367a57cd3..6346126fa0762 100644
--- a/pandas/tseries/plotting.py
+++ b/pandas/tseries/plotting.py
@@ -4,22 +4,18 @@
 """
 
 #!!! TODO: Use the fact that axis can have units to simplify the process
-import datetime as pydt
 from datetime import datetime
 
 from matplotlib import pylab
-import matplotlib.units as units
 
 import numpy as np
 
+import pandas.core.common as com
+import pandas.tseries.frequencies as frequencies
 from pandas import isnull
-from pandas.tseries.period import Period
 from pandas.tseries.offsets import DateOffset
-import pandas.tseries.frequencies as frequencies
 from pandas.tseries.index import DatetimeIndex
-import pandas.core.common as com
-
-from pandas.tseries.converter import (PeriodConverter, TimeSeries_DateLocator,
+from pandas.tseries.converter import (TimeSeries_DateLocator,
                                       TimeSeries_DateFormatter)
 
 #----------------------------------------------------------------------
diff --git a/pandas/tseries/resample.py b/pandas/tseries/resample.py
index 9c22ad66d4f2b..f521afb911e6b 100644
--- a/pandas/tseries/resample.py
+++ b/pandas/tseries/resample.py
@@ -1,6 +1,8 @@
 from datetime import timedelta
 
 import numpy as np
+from pandas.lib import Timestamp
+import pandas.lib as lib
 
 from pandas.core.groupby import BinGrouper, CustomGrouper
 from pandas.tseries.frequencies import to_offset, is_subperiod, is_superperiod
@@ -10,9 +12,6 @@
 import pandas.tseries.tools as tools
 import pandas.core.common as com
 
-from pandas.lib import Timestamp
-import pandas.lib as lib
-
 
 _DEFAULT_METHOD = 'mean'
 
@@ -277,7 +276,6 @@ def _resample_periods(self, obj):
 
 def _take_new_index(obj, indexer, new_index, axis=0):
     from pandas.core.api import Series, DataFrame
-    from pandas.core.internals import BlockManager
 
     if isinstance(obj, Series):
         new_values = com.take_1d(obj.values, indexer)
diff --git a/pandas/tseries/tests/test_converter.py b/pandas/tseries/tests/test_converter.py
index dc5d5cf67995b..1a0d02f300f87 100644
--- a/pandas/tseries/tests/test_converter.py
+++ b/pandas/tseries/tests/test_converter.py
@@ -1,12 +1,8 @@
-from datetime import datetime, time, timedelta, date
-import sys
-import os
+from datetime import datetime, date
 import unittest
 
 import nose
 
-import numpy as np
-
 try:
     import pandas.tseries.converter as converter
 except ImportError:
diff --git a/pandas/tseries/tests/test_daterange.py b/pandas/tseries/tests/test_daterange.py
index 4c46dcccbce1c..c8538c5750a98 100644
--- a/pandas/tseries/tests/test_daterange.py
+++ b/pandas/tseries/tests/test_daterange.py
@@ -11,7 +11,6 @@
 from pandas import Timestamp
 from pandas.tseries.offsets import generate_range
 from pandas.tseries.index import cdate_range, bdate_range, date_range
-import pandas.tseries.tools as tools
 
 import pandas.core.datetools as datetools
 from pandas.util.testing import assertRaisesRegexp
diff --git a/pandas/tseries/tests/test_frequencies.py b/pandas/tseries/tests/test_frequencies.py
index aad831ae48a64..827330507b3b5 100644
--- a/pandas/tseries/tests/test_frequencies.py
+++ b/pandas/tseries/tests/test_frequencies.py
@@ -1,6 +1,4 @@
-from datetime import datetime, time, timedelta
-import sys
-import os
+from datetime import datetime, timedelta
 import unittest
 
 import nose
@@ -14,8 +12,6 @@
 import pandas.tseries.frequencies as fmod
 import pandas.tseries.offsets as offsets
 
-import pandas.lib as lib
-
 
 def test_to_offset_multiple():
     freqstr = '2h30min'
diff --git a/pandas/tseries/tests/test_offsets.py b/pandas/tseries/tests/test_offsets.py
index 487a3091fd83b..b36927c1bd6f6 100644
--- a/pandas/tseries/tests/test_offsets.py
+++ b/pandas/tseries/tests/test_offsets.py
@@ -1,9 +1,11 @@
 from datetime import date, datetime, timedelta
 import unittest
+
 import nose
 from nose.tools import assert_raises
-
 import numpy as np
+from pandas.tslib import monthrange
+from pandas.lib import Timestamp
 
 from pandas.core.datetools import (
     bday, BDay, cday, CDay, BQuarterEnd, BMonthEnd, BYearEnd, MonthEnd,
@@ -11,18 +13,15 @@
     DateOffset, Week, YearBegin, YearEnd, Hour, Minute, Second, Day, Micro,
     Milli, Nano,
     WeekOfMonth, format, ole2datetime, QuarterEnd, to_datetime, normalize_date,
-    get_offset, get_offset_name, inferTimeRule, hasOffsetName,
+    get_offset, get_offset_name, hasOffsetName,
     get_standard_freq)
-
 from pandas.tseries.frequencies import _offset_map
 from pandas.tseries.index import _to_m8
 from pandas.tseries.tools import parse_time_string
 import pandas.tseries.offsets as offsets
-
-from pandas.tslib import monthrange
-from pandas.lib import Timestamp
 from pandas.util.testing import assertRaisesRegexp
 
+
 _multiprocess_can_split_ = True
 
 
diff --git a/pandas/tseries/tests/test_period.py b/pandas/tseries/tests/test_period.py
index 01c984ec2b07d..f7d0114ec84b5 100644
--- a/pandas/tseries/tests/test_period.py
+++ b/pandas/tseries/tests/test_period.py
@@ -11,6 +11,7 @@
 import unittest
 
 from numpy.ma.testutils import assert_equal
+import numpy as np
 
 from pandas import Timestamp
 from pandas.tseries.frequencies import MONTHS, DAYS
@@ -18,10 +19,9 @@
 from pandas.tseries.index import DatetimeIndex, date_range, Index
 from pandas.tseries.tools import to_datetime
 import pandas.tseries.period as pmod
-
 import pandas.core.datetools as datetools
 import pandas as pd
-import numpy as np
+
 randn = np.random.randn
 
 from pandas import Series, TimeSeries, DataFrame
diff --git a/pandas/tseries/tests/test_plotting.py b/pandas/tseries/tests/test_plotting.py
index f1602bbd3f020..93c3be7fb65f5 100644
--- a/pandas/tseries/tests/test_plotting.py
+++ b/pandas/tseries/tests/test_plotting.py
@@ -1,4 +1,3 @@
-import os
 from datetime import datetime, timedelta, date, time
 
 import unittest
diff --git a/pandas/tseries/tests/test_resample.py b/pandas/tseries/tests/test_resample.py
index 02a3030f69519..47aaa7caac0e6 100644
--- a/pandas/tseries/tests/test_resample.py
+++ b/pandas/tseries/tests/test_resample.py
@@ -1,21 +1,18 @@
 # pylint: disable=E1101
 
 from datetime import datetime, timedelta
+import unittest
 
 import numpy as np
+import nose
 
 from pandas import Series, TimeSeries, DataFrame, Panel, isnull, notnull, Timestamp
-
 from pandas.tseries.index import date_range
 from pandas.tseries.offsets import Minute, BDay
 from pandas.tseries.period import period_range, PeriodIndex, Period
 from pandas.tseries.resample import DatetimeIndex, TimeGrouper
 import pandas.tseries.offsets as offsets
 import pandas as pd
-
-import unittest
-import nose
-
 from pandas.util.testing import (assert_series_equal, assert_almost_equal,
                                  assert_frame_equal)
 import pandas.util.testing as tm
diff --git a/pandas/tseries/tests/test_timeseries.py b/pandas/tseries/tests/test_timeseries.py
index f41d31d2afbd0..2473f209157ad 100644
--- a/pandas/tseries/tests/test_timeseries.py
+++ b/pandas/tseries/tests/test_timeseries.py
@@ -1,13 +1,14 @@
 # pylint: disable-msg=E1101,W0612
-import pandas.util.compat as itertools
 from datetime import datetime, time, timedelta
 import sys
 import os
 import unittest
 
 import nose
-
 import numpy as np
+
+import pandas.util.compat as itertools
+
 randn = np.random.randn
 
 from pandas import (Index, Series, TimeSeries, DataFrame,
diff --git a/pandas/tseries/tests/test_timezones.py b/pandas/tseries/tests/test_timezones.py
index 09224d0133e3d..524350f4b35af 100644
--- a/pandas/tseries/tests/test_timezones.py
+++ b/pandas/tseries/tests/test_timezones.py
@@ -1,36 +1,21 @@
 # pylint: disable-msg=E1101,W0612
-from datetime import datetime, time, timedelta, tzinfo, date
-import sys
-import os
+from datetime import datetime, timedelta, tzinfo, date
 import unittest
-import nose
 
+import nose
 import numpy as np
 import pytz
+from pytz import NonExistentTimeError
 
-from pandas import (Index, Series, TimeSeries, DataFrame, isnull,
-                    date_range, Timestamp)
-
-from pandas import DatetimeIndex, Int64Index, to_datetime
-
-from pandas.core.daterange import DateRange
+from pandas import (Index, Series, DataFrame, date_range, Timestamp)
+from pandas import DatetimeIndex, to_datetime
 import pandas.core.datetools as datetools
 import pandas.tseries.offsets as offsets
-from pandas.tseries.index import bdate_range, date_range
+from pandas.tseries.index import bdate_range
 import pandas.tseries.tools as tools
-from pytz import NonExistentTimeError
-
-from pandas.util.testing import assert_series_equal, assert_almost_equal, assertRaisesRegexp
+from pandas.util.testing import assert_series_equal, assertRaisesRegexp
 import pandas.util.testing as tm
-
-import pandas.lib as lib
-import cPickle as pickle
-import pandas.core.datetools as dt
-from numpy.random import rand
 from pandas.util.testing import assert_frame_equal
-import pandas.util.py3compat as py3compat
-from pandas.core.datetools import BDay
-import pandas.core.common as com
 
 
 def _skip_if_no_pytz():
@@ -139,7 +124,6 @@ def test_timedelta_push_over_dst_boundary(self):
         self.assertEquals(result, expected)
 
     def test_tz_localize_dti(self):
-        from pandas.tseries.offsets import Hour
 
         dti = DatetimeIndex(start='1/1/2005', end='1/1/2005 0:00:30.256',
                             freq='L')
diff --git a/pandas/tseries/tests/test_util.py b/pandas/tseries/tests/test_util.py
index 09dad264b7ae0..06d51744a5108 100644
--- a/pandas/tseries/tests/test_util.py
+++ b/pandas/tseries/tests/test_util.py
@@ -1,14 +1,11 @@
-import nose
 import unittest
+from datetime import datetime, date
 
+import nose
 import numpy as np
-from numpy.testing.decorators import slow
 
 from pandas import Series, date_range
 import pandas.util.testing as tm
-
-from datetime import datetime, date
-
 from pandas.tseries.tools import normalize_date
 from pandas.tseries.util import pivot_annual, isleapyear
 
diff --git a/pandas/tseries/tools.py b/pandas/tseries/tools.py
index d914a8fa570d4..c1e7a1313c836 100644
--- a/pandas/tseries/tools.py
+++ b/pandas/tseries/tools.py
@@ -4,7 +4,6 @@
 
 import numpy as np
 
-import pandas.lib as lib
 import pandas.tslib as tslib
 import pandas.core.common as com
 from pandas.util.py3compat import StringIO
@@ -161,9 +160,7 @@ def parse_time_string(arg, freq=None, dayfirst=None, yearfirst=None):
     datetime, datetime/dateutil.parser._result, str
     """
     from pandas.core.config import get_option
-    from pandas.tseries.offsets import DateOffset
-    from pandas.tseries.frequencies import (_get_rule_month, _month_numbers,
-                                            _get_freq_str)
+    from pandas.tseries.frequencies import (_get_rule_month, _month_numbers)
 
     if not isinstance(arg, basestring):
         return arg
diff --git a/pandas/tseries/util.py b/pandas/tseries/util.py
index eb80746cf0c25..8ce68b13fd58b 100644
--- a/pandas/tseries/util.py
+++ b/pandas/tseries/util.py
@@ -1,7 +1,5 @@
 import numpy as np
 
-import pandas as pd
-
 import pandas.core.common as com
 from pandas.core.frame import DataFrame
 import pandas.core.nanops as nanops
diff --git a/pandas/util/clipboard.py b/pandas/util/clipboard.py
index 9f3ee0638352f..b52818f86eb20 100644
--- a/pandas/util/clipboard.py
+++ b/pandas/util/clipboard.py
@@ -42,7 +42,9 @@
 # 1.2 Use the platform module to help determine OS.
 # 1.3 Changed ctypes.windll.user32.OpenClipboard(None) to ctypes.windll.user32.OpenClipboard(0), after some people ran into some TypeError
 
-import platform, os
+import platform
+import os
+
 
 def winGetClipboard():
     ctypes.windll.user32.OpenClipboard(0)
diff --git a/pandas/util/testing.py b/pandas/util/testing.py
index 47bde4ecb32a7..a422a2ba4b17a 100644
--- a/pandas/util/testing.py
+++ b/pandas/util/testing.py
@@ -12,7 +12,7 @@
 
 from datetime import datetime
 from functools import wraps
-from contextlib import contextmanager, closing
+from contextlib import contextmanager
 from httplib import HTTPException
 from urllib2 import urlopen
 from distutils.version import LooseVersion
@@ -31,8 +31,6 @@
 from pandas.tseries.index import DatetimeIndex
 from pandas.tseries.period import PeriodIndex
 
-from pandas.io.common import urlopen
-
 Index = index.Index
 MultiIndex = index.MultiIndex
 Series = series.Series