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"""Monkey-patching for pep8 and pycodestyle."""
try:
import pep8
except ImportError:
pep8 = None
try:
import pycodestyle
except ImportError:
pycodestyle = None
from flake8_polyfill import version
__all__ = ('monkey_patch',)
modules = {
'pep8': [pep8],
'pycodestyle': [pycodestyle],
'all': [pep8, pycodestyle],
}
def monkey_patch(which):
"""Monkey-patch the specified module with the appropriate stdin.
On Flake8 2.5 and lower, Flake8 would would monkey-patch
``pep8.stdin_get_value`` for everyone. This avoided problems where
stdin might be exhausted.
On Flake8 2.6, Flake8 stopped patching ``pep8`` and started
monkey-patching ``pycodestyle.stdin_get_value``.
On Flake8 3.x, Flake8 has no need to monkey patch either ``pep8`` or
``pycodestyle``.
This function accepts three parameters:
- pep8
- pycodestyle
- all
"all" is a special value that will monkey-patch both "pep8" and
"pycodestyle".
:param str which:
The name of the module to patch.
:returns:
Nothing.
:rtype:
NoneType
"""
if (2, 0) <= version.version_info < (3, 0):
from flake8.engine import pep8 as _pep8
stdin_get_value = _pep8.stdin_get_value
elif (3, 0) <= version.version_info < (4, 0):
from flake8 import utils
stdin_get_value = utils.stdin_get_value
for module in modules[which]:
if module is None:
continue
module.stdin_get_value = stdin_get_value