Fix PEP8 violations

Author: simongibbons

pandas/io/json/json.py

@@ -5,7 +5,7 @@
 
 import pandas._libs.json as json
 from pandas._libs.tslib import iNaT
-from pandas.compat import PY3, StringIO, long, u
+from pandas.compat import StringIO, long, u
 from pandas import compat, isna
 from pandas import Series, DataFrame, to_datetime, MultiIndex
 from pandas.io.common import (get_filepath_or_buffer, _get_handle,
@@ -443,7 +443,6 @@ def _get_data_from_filepath(self, filepath_or_buffer):
             data, _ = _get_handle(filepath_or_buffer, 'r',
                                   encoding=self.encoding,
                                   compression=self.compression)
-            # TODO (Simon): Determine if we need to worry about closing file pointers that are passed in from e.g. S3
             self.should_close = True
             self.open_stream = data
 

pandas/tests/io/json/test_compression.py

@@ -109,8 +109,9 @@ def test_with_s3_url(compression):
             with open(path, 'rb') as f:
                 bucket.put_object(Key='test-1', Body=f)
 
-        s3_df = pd.read_json('s3://pandas-test/test-1', compression=compression)
-        assert_frame_equal(df, s3_df)
+        roundtripped_df = pd.read_json('s3://pandas-test/test-1',
+                                       compression=compression)
+        assert_frame_equal(df, roundtripped_df)
 
 
 @pytest.mark.parametrize('compression', COMPRESSION_TYPES)