pep8 fixes

Author: nateyoder

pandas/core/base.py

@@ -8,7 +8,8 @@
 
 from pandas.core.dtypes.missing import isnull
 from pandas.core.dtypes.generic import ABCDataFrame, ABCSeries, ABCIndexClass
-from pandas.core.dtypes.common import is_object_dtype, is_list_like, is_scalar, is_extension_type
+from pandas.core.dtypes.common import (is_object_dtype, is_list_like,
+                                       is_scalar, is_extension_type)
 from pandas.util.validators import validate_bool_kwarg
 
 from pandas.core import common as com, algorithms
@@ -946,7 +947,6 @@ def map_f(values, f):
             else:
                 map_f = lib.map_infer
 
-        map_values = None
         if isinstance(arg, dict):
             if hasattr(arg, '__missing__'):
                 # If a dictionary subclass defines a default value method,
@@ -970,7 +970,6 @@ def map_f(values, f):
 
         return new_values
 
-
     def value_counts(self, normalize=False, sort=True, ascending=False,
                      bins=None, dropna=True):
         """

pandas/core/series.py

@@ -2111,7 +2111,8 @@ def map(self, arg, na_action=None):
             input_values = self.asobject
         new_values = super(Series, self)._map_values(
             input_values, arg, na_action=na_action)
-        return self._constructor(new_values, index=self.index).__finalize__(self)
+        return self._constructor(new_values,
+                                 index=self.index).__finalize__(self)
 
     def _gotitem(self, key, ndim, subset=None):
         """