fix problem with PEP8

Author: Rubtsowa

sdc/datatypes/hpat_pandas_dataframe_types.py

@@ -124,6 +124,7 @@ def __init__(self, dmm, fe_type):
         ]
         models.StructModel.__init__(self, dmm, fe_type, members)
 
+
 make_attribute_wrapper(DataFrameType, 'data', '_data')
 
 
@@ -189,6 +190,7 @@ def hpat_pandas_dataframe_impl(data=None, index=None, columns=None, dtype=None,
 
         return hpat_pandas_dataframe_impl
 
+
 @box(DataFrameType)
 def hpat_pandas_dataframe_box(typ, val, c):
     """

sdc/rewrites/dataframe_constructor.py

@@ -167,6 +167,7 @@ def _replace_index_with_arrays(args, stmt, block, func_ir):
 
         return new_args
 
+
 @overload(DataFrame)
 def pd_dataframe_overload(data, index=None, columns=None, dtype=None, copy=False):
     """