PEP8: pandas/indexes

Author: sinhrks <sinhrks@gmail.com>

Closes #12786 from sinhrks/pep_indexes and squashes the following commits:

f7ec60e [sinhrks] PEP8: pandas/indexes

Author: sinhrks

ci/lint.sh

@@ -8,7 +8,7 @@ RET=0
 
 if [ "$LINT" ]; then
     echo "Linting"
-    for path in 'core' 'io' 'stats' 'compat' 'sparse' 'tools' 'tseries' 'tests' 'computation' 'util'
+    for path in 'core' 'indexes' 'io' 'stats' 'compat' 'sparse' 'tools' 'tseries' 'tests' 'computation' 'util'
     do
         echo "linting -> pandas/$path"
         flake8 pandas/$path --filename '*.py'

pandas/indexes/base.py

@@ -339,6 +339,7 @@ def _simple_new(cls, values, name=None, dtype=None, **kwargs):
         values : the values to create the new Index, optional
         kwargs : updates the default attributes for this Index
         """
+
     @Appender(_index_shared_docs['_shallow_copy'])
     def _shallow_copy(self, values=None, **kwargs):
         if values is None:
@@ -1349,6 +1350,7 @@ def _ensure_compat_concat(indexes):
         --------
         numpy.ndarray.take
         """
+
     @Appender(_index_shared_docs['take'])
     def take(self, indices, axis=0, allow_fill=True, fill_value=None):
         indices = com._ensure_platform_int(indices)
@@ -1848,8 +1850,8 @@ def symmetric_difference(self, other, result_name=None):
 
         Notes
         -----
-        ``symmetric_difference`` contains elements that appear in either ``idx1`` or
-        ``idx2`` but not both. Equivalent to the Index created by
+        ``symmetric_difference`` contains elements that appear in either
+        ``idx1`` or ``idx2`` but not both. Equivalent to the Index created by
         ``(idx1 - idx2) + (idx2 - idx1)`` with duplicates dropped.
 
         The sorting of a result containing ``NaN`` values is not guaranteed

pandas/indexes/multi.py

@@ -12,7 +12,7 @@
 
 from pandas.compat import range, zip, lrange, lzip, map
 from pandas import compat
-from pandas.core.base import FrozenList, FrozenNDArray
+from pandas.core.base import FrozenList
 import pandas.core.base as base
 from pandas.util.decorators import (Appender, cache_readonly,
                                     deprecate, deprecate_kwarg)
@@ -1008,9 +1008,9 @@ def __getitem__(self, key):
     def take(self, indices, axis=0, allow_fill=True, fill_value=None):
         indices = com._ensure_platform_int(indices)
         taken = self._assert_take_fillable(self.labels, indices,
-                                                allow_fill=allow_fill,
-                                                fill_value=fill_value,
-                                                na_value=-1)
+                                           allow_fill=allow_fill,
+                                           fill_value=fill_value,
+                                           na_value=-1)
         return MultiIndex(levels=self.levels, labels=taken,
                           names=self.names, verify_integrity=False)