cleanups

Author: jreback

pandas/_libs/tslib.pyx

@@ -502,7 +502,7 @@ class Timestamp(_Timestamp):
         """
         Return an period of which this timestamp is an observation.
         """
-        from pandas.tseries.period import Period
+        from pandas import Period
 
         if freq is None:
             freq = self.freq

pandas/compat/pickle_compat.py

@@ -94,7 +94,9 @@ def load_reduce(self):
     ('pandas.indexes.range', 'RangeIndex'):
         ('pandas.core.indexes.range', 'RangeIndex'),
     ('pandas.indexes.multi', 'MultiIndex'):
-        ('pandas.core.indexes.multi', 'MultiIndex')
+        ('pandas.core.indexes.multi', 'MultiIndex'),
+    ('pandas.tseries.period', 'PeriodIndex'):
+        ('pandas.core.indexes.period', 'PeriodIndex')
 }