Fixing PEP8 issues

readding F401 detection

Signed-off-by: Fabian Haase <haase.fabian@gmail.com>

Author: FHaase

doc/source/contributing_docstring.rst

@@ -685,8 +685,8 @@ shown:
 
 .. code-block:: python
 
-    import numpy as np
-    import pandas as pd
+    import numpy as np          # noqa: F401
+    import pandas as pd         # noqa: F401
 
 Any other module used in the examples must be explicitly imported, one per line (as
 recommended in :pep:`8#imports`)

doc/source/io.rst

@@ -5350,7 +5350,6 @@ And here's the code:
    import pandas as pd
    import sqlite3
    from numpy.random import randn
-   from pandas.io import sql
 
    sz = 1000000
    df = pd.DataFrame({'A': randn(sz), 'B': [1] * sz})

pandas/core/accessor.py

@@ -201,8 +201,9 @@ def decorator(accessor):
 
 .. code-block:: python
 
-    def __init__(self, pandas_object):
-
+    def __init__(self, pandas_object):  # noqa: E999
+        ...
+        
 For consistency with pandas methods, you should raise an ``AttributeError``
 if the data passed to your accessor has an incorrect dtype.
 

setup.cfg

@@ -34,7 +34,6 @@ exclude =
 [flake8-rst]
 ignore =
     F821,  # undefined name
-    F401,  # imported but unused
     W391,  # blank line at end of file [Seems to be a bug (v0.4.1)]