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1
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""" |
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2
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Cross-Python version compatibility. |
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3
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""" |
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4
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import platform |
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5
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import sys |
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6
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from argparse import _AppendAction as AppendAction |
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7
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from importlib import import_module |
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8
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9
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10
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def get_implementation(override=None): |
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11
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""" |
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12
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Detect the active Python version and return a reference to the |
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13
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module serving the version-specific pyclean implementation. |
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14
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""" |
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15
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implementation = dict( |
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16
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CPython2='pyclean.py2clean', |
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CPython3='pyclean.py3clean', |
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PyPy2='pyclean.pypyclean', |
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PyPy3='pyclean.pypyclean', |
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) |
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21
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22
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# pylint: disable=consider-using-f-string |
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detected_version = '%s%s' % ( |
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platform.python_implementation(), |
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sys.version[0], |
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) |
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module_name = implementation[override if override else detected_version] |
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return import_module(module_name) |
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31
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32
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class ExtendAction(AppendAction): |
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33
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""" |
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34
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Argparse "extend" action for Python < 3.8. |
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35
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A simplified backport from the Python standard library. |
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36
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""" |
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37
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38
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def __call__(self, parser, namespace, values, option_string=None): |
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39
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items = getattr(namespace, self.dest, None) |
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40
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items = [] if items is None else items[:] |
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41
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items.extend(values) |
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42
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setattr(namespace, self.dest, items) |
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bittner /
pyclean
