tox.ini test for flake8

# content of: tox.ini , put in same dir as setup.py
[tox]
envlist = py27
[testenv]
#deps= -r requirements.txt       # install pytest in the venvs
usedevelop=True
skipsdist=True
changedir = tests
deps = discover
       unittest2
commands = unit2 discover

[flake8]
# http://flake8.pycqa.org/en/latest/user/error-codes.html
# https://pycodestyle.readthedocs.io/en/latest/intro.html#error-codes
# http://flake8.pycqa.org/en/latest/user/options.html
max-complexity=90
max-line-length=120
verbose=2

# Code complexity analysis using Radon.
# To disable warnings regarding these tools, comment the lines below
# http://radon.readthedocs.io/en/latest/flake8.html
# http://radon.readthedocs.io/en/latest/intro.html
radon-no-assert=True
radon-max-cc=90
radon-show-closures=True

# Configuration of errors and warnings printed in the output
ignore =
    #
    # NOTE (*)
    # In the default configuration, the checks E121, E123, E126, E133, E226,
    # E241, E242, E704, W503 and W504 are ignored because they are not rules
    # unanimously accepted, and PEP 8 does not enforce them. The check W503
    # is mutually exclusive with check W504. The check E133 is mutually exclusive
    # with check E123. Use switch --hang-closing to report E133 instead of E123.
    #
    # NOTE (^)
    # These checks can be disabled at the line level using the # noqa special comment,
    # in the python code This possibility should be reserved for special cases.

    #
    #   E1 - Indentation
    #
    # indentation contains mixed spaces and tabs
    # E101,
    # indentation is not a multiple of four
    # E111,
    # expected an indented block
    # E112,
    # unexpected indentation
    # E113,
    # indentation is not a multiple of four (comment)
    # E114,
    # expected an indented block (comment)
    # E115,
    # unexpected indentation (comment)
    # E116,
    # (*^) - continuation line under-indented for hanging indent
    # E121,
    # (^) - continuation line missing indentation or outdented
    # E122,
    # (*) - closing bracket does not match indentation of opening bracket’s line
    # E123,
    # (^) - closing bracket does not match visual indentation
    # E124,
    # (^) - continuation line with same indent as next logical line
    # E125,
    # (*^) - continuation line over-indented for hanging indent
    # E126,
    # (^) - continuation line over-indented for visual indent
    # E127 ,
    # (^) - continuation line under-indented for visual indent
    # E128,
    # (^) - visually indented line with same indent as next logical line
    # E129,
    # (^) - continuation line unaligned for hanging indent
    # E131,
    # (*) - closing bracket is missing indentation
    # E133,

    #
    # E2 - Whitespace
    #
    # whitespace after ‘(‘
    # E201,
    # whitespace before ‘)’
    # E202,
    # whitespace before ‘:’
    # E203,
    # whitespace before ‘(‘
    # E211,
    # multiple spaces before operator
    # E221,
    # multiple spaces after operator
    # E222,
    # tab before operator
    # E223,
    # tab after operator
    # E224,
    # missing whitespace around operator
    # E225,
    # (*) - missing whitespace around arithmetic operator
    # E226,
    # missing whitespace around bitwise or shift operator
    # E227,
    # missing whitespace around modulo operator
    # E228,
    # missing whitespace after ‘,’, ‘;’, or ‘:’
    # E231,
    # (*) - multiple spaces after ‘,’
    # E241,
    # (*) - tab after ‘,’
    # E242,
    # unexpected spaces around keyword / parameter equals
    # E251,
    # at least two spaces before inline comment
    # E261,
    # inline comment should start with ‘# ‘
    # E262,
    # block comment should start with ‘# ‘
    # E265,
    # too many leading ‘#’ for block comment
    # E266,
    # multiple spaces after keyword
    # E271,
    # multiple spaces before keyword
    # E272,
    # tab after keyword
    # E273,
    # tab before keyword
    # E274,
    # missing whitespace after keyword
    # E275,

    #
    # E3 - Blank line
    #
    # expected 1 blank line, found 0
    # E301,
    # expected 2 blank lines, found 0
    # E302,
    # too many blank lines (3)
    # E303,
    # blank lines found after function decorator
    # E304,
    # expected 2 blank lines after end of function or class
    # E305,
    # expected 1 blank line before a nested definition
    # E306,

    #
    # E4 - Import
    #
    # multiple imports on one line
    # E401,
    # module level import not at top of file
    # E402,

    #
    #   E5 - Line length
    #
    # (^) - line too long (82 > 79 characters)
    # E501,
    # the backslash is redundant between brackets
    # E502,

    #
    #   E7 - Statement
    #
    # multiple statements on one line (colon)
    # E701,
    # multiple statements on one line (semicolon)
    # E702,
    # statement ends with a semicolon
    # E703,
    # (*) - multiple statements on one line (def)
    # E704,
    # (^) - comparison to None should be ‘if cond is None:’
    # E711,
    # (^) - comparison to True should be ‘if cond is True:’ or ‘if cond:’
    # E712,
    # test for membership should be ‘not in’
    # E713,
    # test for object identity should be ‘is not’
    # E714,
    # (^) - do not compare types, use ‘isinstance()’
    # E721,
    # do not use bare except, specify exception instead
    # E722,
    # do not assign a lambda expression, use a def
    # E731,
    # do not use variables named ‘l’, ‘O’, or ‘I’
    # E741,
    # do not define classes named ‘l’, ‘O’, or ‘I’
    # E742,
    # do not define functions named ‘l’, ‘O’, or ‘I’
    # E743,

    #
    #   E9 - Runtime
    #
    # SyntaxError or IndentationError
    # E901,
    # IOError
    # E902,

    #
    #   W - Indentation, whitespace, blank lines, breaks and deprecation warnings
    #
    #
    # indentation contains tabs
    # W191,
    # trailing whitespace
    # W291,
    # no newline at end of file
    # W292,
    # blank line contains whitespace
    # W293,
    # blank line at end of file
    # W391,
    # (*) - line break before binary operator
    # W503,
    # (*) - line break after binary operator
    # W504,
    # .has_key() is deprecated, use ‘in’
    # W601,
    # deprecated form of raising exception
    # W602,
    # ‘<>’ is deprecated, use ‘!=’
    # W603,
    # backticks are deprecated, use ‘repr()’
    # W604,
    # invalid escape sequence ‘x’
    # W605,

    #
    # ERRORS and VIOLATION CODES. Add a comment in the line to enable its verification
    # module imported but unused
    # F401,
    # import module from line N shadowed by loop variable
    # F402,
    # ‘from module import *’ used; unable to detect undefined names
    # F403,
    # future import(s) name after other statements
    # F404,
    # name may be undefined, or defined from star imports: module
    # F405,
    # ‘from module import *’ only allowed at module level
    # F406,
    # an undefined __future__ feature name was imported
    # F407,
    # dictionary key name repeated with different values
    # F601,
    # dictionary key variable name repeated with different values
    # F602,
    # too many expressions in an assignment with star-unpacking
    # F621,
    # two or more starred expressions in an assignment (a, *b, *c = d)
    # F622,
    # assertion test is a tuple, which are always True
    # F631,
    # a break statement outside of a while or for loop
    # F701,
    # a continue statement outside of a while or for loop
    # F702,
    # a continue statement in a finally block in a loop
    # F703,
    # a yield or yield from statement outside of a function
    # F704,
    # a return statement with arguments inside a generator
    # F705,
    # a return statement outside of a function/method
    # F706,
    # an except: block as not the last exception handler
    # F707,
    # redefinition of unused <name> from line <N>
    # F811,
    # list comprehension redefines <name> from line <N>
    # F812,
    # undefined name name
    # F821,
    # undefined name name in __all__
    # F822,
    # local variable name … referenced before assignment
    # F823,
    # duplicate argument name in function definition
    # F831,
    # local variable name is assigned to but never used
    # F841,

#
# Exclude dirs from verification
#
exclude =
        .hg,
        __pycache__,
        old,
        build,
        dist,
        static,
        .Python
        build,
        develop-eggs,
        downloads,
        eggs,
        .eggs,
        lib,
        lib64,
        parts,
        sdist,
        var,
        wheels,