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Diffstat (limited to 'e/lib/python3.11/site-packages/setuptools/_vendor/importlib_metadata/_collections.py')
-rw-r--r-- | e/lib/python3.11/site-packages/setuptools/_vendor/importlib_metadata/_collections.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/e/lib/python3.11/site-packages/setuptools/_vendor/importlib_metadata/_collections.py b/e/lib/python3.11/site-packages/setuptools/_vendor/importlib_metadata/_collections.py new file mode 100644 index 0000000..cf0954e --- /dev/null +++ b/e/lib/python3.11/site-packages/setuptools/_vendor/importlib_metadata/_collections.py @@ -0,0 +1,30 @@ +import collections + + +# from jaraco.collections 3.3 +class FreezableDefaultDict(collections.defaultdict): + """ + Often it is desirable to prevent the mutation of + a default dict after its initial construction, such + as to prevent mutation during iteration. + + >>> dd = FreezableDefaultDict(list) + >>> dd[0].append('1') + >>> dd.freeze() + >>> dd[1] + [] + >>> len(dd) + 1 + """ + + def __missing__(self, key): + return getattr(self, '_frozen', super().__missing__)(key) + + def freeze(self): + self._frozen = lambda key: self.default_factory() + + +class Pair(collections.namedtuple('Pair', 'name value')): + @classmethod + def parse(cls, text): + return cls(*map(str.strip, text.split("=", 1))) |