Traceback (most recent call last):


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/bin/.flake8-wrapped", line 11, in <module>

sys.exit(main())


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/main/cli.py", line 18, in main

app.run(argv)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/main/application.py", line 394, in run

self._run(argv)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/main/application.py", line 381, in _run

self.initialize(argv)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/main/application.py", line 366, in initialize

self.parse_configuration_and_cli(argv)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/main/application.py", line 219, in parse_configuration_and_cli

self.option_manager, self.config_finder, argv


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/options/aggregator.py", line 33, in aggregate_options

default_values, _ = manager.parse_args([], values=values)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/options/manager.py", line 312, in parse_args

self._normalize(options)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/options/manager.py", line 305, in _normalize

setattr(options, option.dest, option.normalize(old_value))


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/options/manager.py", line 151, in normalize

return utils.parse_comma_separated_list(value)


 "/nix/store/xp46dxgjkz9l5plhzjgm3p9isgdv2mjq-python3.7-flake8-3.7.7/lib/python3.7/site-packages/flake8/utils.py", line 44, in parse_comma_separated_list

value = regexp.split(value)
TypeError: expected string or bytes-like object

Traceback (most recent call last):


 "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main

status = self.run(options, args)


 "c:\python27\lib\site-packages\pip\commands\install.py", line 335, in run

wb.build(autobuilding=True)


 "c:\python27\lib\site-packages\pip\wheel.py", line 749, in build

self.requirement_set.prepare_files(self.finder)


 "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files

ignore_dependencies=self.ignore_dependencies))


 "c:\python27\lib\site-packages\pip\req\req_set.py", line 699, in _prepare_file

set(req_to_install.extras) - set(dist.extras)


 "c:\python27\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2757, in extras

return [dep for dep in self._dep_map if dep]


 "c:\python27\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2799, in _dep_map

self.__dep_map = self._compute_dependencies()


 "c:\python27\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2816, in _compute_dependencies

common = frozenset(reqs_for_extra(None))


 "c:\python27\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2813, in reqs_for_extra

if not req.marker or req.marker.evaluate({'extra': extra}):


 "c:\python27\lib\site-packages\pip\_vendor\packaging\markers.py", line 303, in evaluate

return _evaluate_markers(self._markers, current_environment)


 "c:\python27\lib\site-packages\pip\_vendor\packaging\markers.py", line 234, in _evaluate_markers

groups[-1].append(_eval_op(lhs_value, op, rhs_value))


 "c:\python27\lib\site-packages\pip\_vendor\packaging\markers.py", line 191, in _eval_op

return spec.contains(lhs)


 "c:\python27\lib\site-packages\pip\_vendor\packaging\specifiers.py", line 170, in contains

item = self._coerce_version(item)


 "c:\python27\lib\site-packages\pip\_vendor\packaging\specifiers.py", line 141, in _coerce_version

version = parse(version)


 "c:\python27\lib\site-packages\pip\_vendor\packaging\version.py", line 31, in parse

return Version(version)


 "c:\python27\lib\site-packages\pip\_vendor\packaging\version.py", line 200, in __init__

match = self._regex.search(version)
TypeError: expected string or buffer
