Merge pull request #3023 from y-p/no_asserts

Continuing #2057, s/assert/raise AssertionError/g

Author: y-p

pandas/core/config.py

@@ -313,8 +313,10 @@ def __doc__(self):
 
 class option_context(object):
     def __init__(self, *args):
-        assert len(args) % 2 == 0 and len(args) >= 2, \
-            "Need to invoke as option_context(pat,val,[(pat,val),..))."
+        if not ( len(args) % 2 == 0 and len(args) >= 2):
+           errmsg =  "Need to invoke as option_context(pat,val,[(pat,val),..))."
+           raise AssertionError(errmsg)
+
         ops = zip(args[::2], args[1::2])
         undo = []
         for pat, val in ops:

pandas/core/frame.py

@@ -709,7 +709,8 @@ def __unicode__(self):
                 self.info(buf=buf, verbose=verbose)
 
         value = buf.getvalue()
-        assert type(value) == unicode
+        if not  type(value) == unicode:
+            raise AssertionError()
 
         return value
 

pandas/core/panel.py

@@ -618,7 +618,8 @@ def get_value(self, *args):
         value : scalar value
         """
         # require an arg for each axis
-        assert(len(args) == self._AXIS_LEN)
+        if not ((len(args) == self._AXIS_LEN)):
+            raise AssertionError()
 
         # hm, two layers to the onion
         frame = self._get_item_cache(args[0])
@@ -642,7 +643,8 @@ def set_value(self, *args):
             otherwise a new object
         """
         # require an arg for each axis and the value
-        assert(len(args) == self._AXIS_LEN + 1)
+        if not ((len(args) == self._AXIS_LEN + 1)):
+            raise AssertionError()
 
         try:
             frame = self._get_item_cache(args[0])
@@ -685,7 +687,8 @@ def __setitem__(self, key, value):
                 **self._construct_axes_dict_for_slice(self._AXIS_ORDERS[1:]))
             mat = value.values
         elif isinstance(value, np.ndarray):
-            assert(value.shape == shape[1:])
+            if not ((value.shape == shape[1:])):
+                raise AssertionError()
             mat = np.asarray(value)
         elif np.isscalar(value):
             dtype, value = _infer_dtype_from_scalar(value)
@@ -1481,7 +1484,8 @@ def _prep_ndarray(self, values, copy=True):
         else:
             if copy:
                 values = values.copy()
-        assert(values.ndim == self._AXIS_LEN)
+        if not ((values.ndim == self._AXIS_LEN)):
+            raise AssertionError()
         return values
 
     @staticmethod

pandas/core/series.py

@@ -1126,7 +1126,8 @@ def __unicode__(self):
         else:
             result = u'Series([], dtype: %s)' % self.dtype
 
-        assert type(result) == unicode
+        if not ( type(result) == unicode):
+            raise AssertionError()
         return result
 
     def __repr__(self):
@@ -1194,7 +1195,9 @@ def to_string(self, buf=None, na_rep='NaN', float_format=None,
         the_repr = self._get_repr(float_format=float_format, na_rep=na_rep,
                                   length=length, dtype=dtype, name=name)
 
-        assert type(the_repr) == unicode
+        # catch contract violations
+        if not  type(the_repr) == unicode:
+            raise AssertionError("expected unicode string")
 
         if buf is None:
             return the_repr
@@ -1212,7 +1215,8 @@ def _get_repr(self, name=False, print_header=False, length=True, dtype=True,
                                         length=length, dtype=dtype, na_rep=na_rep,
                                         float_format=float_format)
         result = formatter.to_string()
-        assert type(result) == unicode
+        if not ( type(result) == unicode):
+            raise AssertionError()
         return result
 
     def __iter__(self):

pandas/io/date_converters.py

@@ -46,10 +46,12 @@ def _maybe_cast(arr):
 
 
 def _check_columns(cols):
-    assert(len(cols) > 0)
+    if not ((len(cols) > 0)):
+        raise AssertionError()
 
     N = len(cols[0])
     for c in cols[1:]:
-        assert(len(c) == N)
+        if not ((len(c) == N)):
+            raise AssertionError()
 
     return N

pandas/io/parsers.py

@@ -579,7 +579,8 @@ def _clean_options(self, options, engine):
 
         # type conversion-related
         if converters is not None:
-            assert(isinstance(converters, dict))
+            if not (isinstance(converters, dict)):
+                raise AssertionError()
         else:
             converters = {}
 
@@ -1474,7 +1475,8 @@ def _rows_to_cols(self, content):
         if self._implicit_index:
             col_len += len(self.index_col)
 
-        assert(self.skip_footer >= 0)
+        if not ((self.skip_footer >= 0)):
+            raise AssertionError()
 
         if col_len != zip_len and self.index_col is not False:
             row_num = -1
@@ -1768,12 +1770,15 @@ def __init__(self, f, colspecs, filler, thousands=None):
         self.filler = filler  # Empty characters between fields.
         self.thousands = thousands
 
-        assert isinstance(colspecs, (tuple, list))
+        if not ( isinstance(colspecs, (tuple, list))):
+            raise AssertionError()
+
         for colspec in colspecs:
-            assert isinstance(colspec, (tuple, list))
-            assert len(colspec) == 2
-            assert isinstance(colspec[0], int)
-            assert isinstance(colspec[1], int)
+            if not ( isinstance(colspec, (tuple, list)) and
+                       len(colspec) == 2 and
+                       isinstance(colspec[0], int) and
+                       isinstance(colspec[1], int) ):
+                raise AssertionError()
 
     def next(self):
         line = next(self.f)

pandas/sparse/array.py

@@ -25,7 +25,8 @@ def _sparse_op_wrap(op, name):
     """
     def wrapper(self, other):
         if isinstance(other, np.ndarray):
-            assert(len(self) == len(other))
+            if not ((len(self) == len(other))):
+                raise AssertionError()
             if not isinstance(other, SparseArray):
                 other = SparseArray(other, fill_value=self.fill_value)
             return _sparse_array_op(self, other, op, name)
@@ -129,7 +130,8 @@ def __new__(cls, data, sparse_index=None, kind='integer', fill_value=None,
                                                    fill_value=fill_value)
             else:
                 values = data
-                assert(len(values) == sparse_index.npoints)
+                if not ((len(values) == sparse_index.npoints)):
+                    raise AssertionError()
 
         # Create array, do *not* copy data by default
         if copy:
@@ -275,7 +277,8 @@ def take(self, indices, axis=0):
         -------
         taken : ndarray
         """
-        assert(axis == 0)
+        if not ((axis == 0)):
+            raise AssertionError()
         indices = np.asarray(indices, dtype=int)
 
         n = len(self)

pandas/sparse/frame.py

@@ -709,7 +709,9 @@ def _join_compat(self, other, on=None, how='left', lsuffix='', rsuffix='',
 
     def _join_index(self, other, how, lsuffix, rsuffix):
         if isinstance(other, Series):
-            assert(other.name is not None)
+            if not (other.name is not None):
+                raise AssertionError()
+
             other = SparseDataFrame({other.name: other},
                                     default_fill_value=self.default_fill_value)
 

pandas/sparse/panel.py

@@ -71,7 +71,8 @@ def __init__(self, frames, items=None, major_axis=None, minor_axis=None,
                                     default_kind=default_kind)
             frames = new_frames
 
-        assert(isinstance(frames, dict))
+        if not (isinstance(frames, dict)):
+            raise AssertionError()
 
         self.default_fill_value = fill_value = default_fill_value
         self.default_kind = kind = default_kind

pandas/sparse/series.py

@@ -110,7 +110,8 @@ def __new__(cls, data, index=None, sparse_index=None, kind='block',
             if isinstance(data, SparseSeries) and index is None:
                 index = data.index
             elif index is not None:
-                assert(len(index) == len(data))
+                if not (len(index) == len(data)):
+                    raise AssertionError()
 
             sparse_index = data.sp_index
             values = np.asarray(data)
@@ -128,7 +129,8 @@ def __new__(cls, data, index=None, sparse_index=None, kind='block',
                                                    fill_value=fill_value)
             else:
                 values = data
-                assert(len(values) == sparse_index.npoints)
+                if not (len(values) == sparse_index.npoints):
+                    raise AssertionError()
         else:
             if index is None:
                 raise Exception('must pass index!')
@@ -446,7 +448,8 @@ def sparse_reindex(self, new_index):
         -------
         reindexed : SparseSeries
         """
-        assert(isinstance(new_index, splib.SparseIndex))
+        if not (isinstance(new_index, splib.SparseIndex)):
+            raise AssertionError()
 
         new_values = self.sp_index.to_int_index().reindex(self.sp_values,
                                                           self.fill_value,

pandas/stats/ols.py

@@ -619,7 +619,8 @@ def _set_window(self, window_type, window, min_periods):
         self._window_type = scom._get_window_type(window_type)
 
         if self._is_rolling:
-            assert(window is not None)
+            if not ((window is not None)):
+                raise AssertionError()
             if min_periods is None:
                 min_periods = window
         else:
@@ -1196,7 +1197,8 @@ def _nobs_raw(self):
         return result.astype(int)
 
     def _beta_matrix(self, lag=0):
-        assert(lag >= 0)
+        if not ((lag >= 0)):
+            raise AssertionError()
 
         betas = self._beta_raw
 
@@ -1257,7 +1259,8 @@ def _filter_data(lhs, rhs, weights=None):
         Cleaned lhs and rhs
     """
     if not isinstance(lhs, Series):
-        assert(len(lhs) == len(rhs))
+        if not ((len(lhs) == len(rhs))):
+            raise AssertionError()
         lhs = Series(lhs, index=rhs.index)
 
     rhs = _combine_rhs(rhs)

pandas/stats/plm.py

@@ -101,8 +101,10 @@ def _prepare_data(self):
             y_regressor = y
 
         if weights is not None:
-            assert(y_regressor.index.equals(weights.index))
-            assert(x_regressor.index.equals(weights.index))
+            if not ((y_regressor.index.equals(weights.index))):
+                raise AssertionError()
+            if not ((x_regressor.index.equals(weights.index))):
+                raise AssertionError()
 
             rt_weights = np.sqrt(weights)
             y_regressor = y_regressor * rt_weights
@@ -169,7 +171,8 @@ def _convert_x(self, x):
         # .iteritems
         iteritems = getattr(x, 'iteritems', x.items)
         for key, df in iteritems():
-            assert(isinstance(df, DataFrame))
+            if not ((isinstance(df, DataFrame))):
+                raise AssertionError()
 
             if _is_numeric(df):
                 x_converted[key] = df
@@ -637,7 +640,8 @@ def _y_predict_raw(self):
         return (betas * x).sum(1)
 
     def _beta_matrix(self, lag=0):
-        assert(lag >= 0)
+        if not ((lag >= 0)):
+            raise AssertionError()
 
         index = self._y_trans.index
         major_labels = index.labels[0]

pandas/tools/merge.py

@@ -404,14 +404,17 @@ def _validate_specification(self):
         elif self.left_on is not None:
             n = len(self.left_on)
             if self.right_index:
-                assert(len(self.left_on) == self.right.index.nlevels)
+                if not ((len(self.left_on) == self.right.index.nlevels)):
+                    raise AssertionError()
                 self.right_on = [None] * n
         elif self.right_on is not None:
             n = len(self.right_on)
             if self.left_index:
-                assert(len(self.right_on) == self.left.index.nlevels)
+                if not ((len(self.right_on) == self.left.index.nlevels)):
+                    raise AssertionError()
                 self.left_on = [None] * n
-        assert(len(self.right_on) == len(self.left_on))
+        if not ((len(self.right_on) == len(self.left_on))):
+            raise AssertionError()
 
 
 def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
@@ -424,7 +427,8 @@ def _get_join_indexers(left_keys, right_keys, sort=False, how='inner'):
     -------
 
     """
-    assert(len(left_keys) == len(right_keys))
+    if not ((len(left_keys) == len(right_keys))):
+        raise AssertionError()
 
     left_labels = []
     right_labels = []
@@ -537,8 +541,9 @@ def _left_join_on_index(left_ax, right_ax, join_keys, sort=False):
     left_indexer = None
 
     if len(join_keys) > 1:
-        assert(isinstance(right_ax, MultiIndex) and
-               len(join_keys) == right_ax.nlevels)
+        if not ((isinstance(right_ax, MultiIndex) and
+               len(join_keys) == right_ax.nlevels) ):
+            raise AssertionError()
 
         left_tmp, right_indexer = \
             _get_multiindex_indexer(join_keys, right_ax,
@@ -637,7 +642,8 @@ def __init__(self, data_list, join_index, indexers, axis=1, copy=True):
         if axis <= 0:  # pragma: no cover
             raise MergeError('Only axis >= 1 supported for this operation')
 
-        assert(len(data_list) == len(indexers))
+        if not ((len(data_list) == len(indexers))):
+            raise AssertionError()
 
         self.units = []
         for data, indexer in zip(data_list, indexers):
@@ -925,7 +931,8 @@ def __init__(self, objs, axis=0, join='outer', join_axes=None,
             axis = 1 if axis == 0 else 0
 
         self._is_series = isinstance(sample, Series)
-        assert(0 <= axis <= sample.ndim)
+        if not ((0 <= axis <= sample.ndim)):
+            raise AssertionError()
 
         # note: this is the BlockManager axis (since DataFrame is transposed)
         self.axis = axis
@@ -1084,7 +1091,8 @@ def _concat_single_item(self, objs, item):
                 to_concat.append(item_values)
 
         # this method only gets called with axis >= 1
-        assert(self.axis >= 1)
+        if not ((self.axis >= 1)):
+            raise AssertionError()
         return com._concat_compat(to_concat, axis=self.axis - 1)
 
     def _get_result_dim(self):
@@ -1103,7 +1111,8 @@ def _get_new_axes(self):
                     continue
                 new_axes[i] = self._get_comb_axis(i)
         else:
-            assert(len(self.join_axes) == ndim - 1)
+            if not ((len(self.join_axes) == ndim - 1)):
+                raise AssertionError()
 
             # ufff...
             indices = range(ndim)

pandas/tools/pivot.py

@@ -300,7 +300,8 @@ def _get_names(arrs, names, prefix='row'):
             else:
                 names.append('%s_%d' % (prefix, i))
     else:
-        assert(len(names) == len(arrs))
+        if not ((len(names) == len(arrs))):
+            raise AssertionError()
         if not isinstance(names, list):
             names = list(names)