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author | cyfraeviolae <cyfraeviolae> | 2024-04-03 03:10:44 -0400 |
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committer | cyfraeviolae <cyfraeviolae> | 2024-04-03 03:10:44 -0400 |
commit | 6d7ba58f880be618ade07f8ea080fe8c4bf8a896 (patch) | |
tree | b1c931051ffcebd2bd9d61d98d6233ffa289bbce /venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py | |
parent | 4f884c9abc32990b4061a1bb6997b4b37e58ea0b (diff) |
venv
Diffstat (limited to 'venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py')
-rw-r--r-- | venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py b/venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py new file mode 100644 index 0000000..98fce80 --- /dev/null +++ b/venv/lib/python3.11/site-packages/setuptools/_distutils/_collections.py @@ -0,0 +1,56 @@ +import collections +import itertools + + +# from jaraco.collections 3.5.1 +class DictStack(list, collections.abc.Mapping): + """ + A stack of dictionaries that behaves as a view on those dictionaries, + giving preference to the last. + + >>> stack = DictStack([dict(a=1, c=2), dict(b=2, a=2)]) + >>> stack['a'] + 2 + >>> stack['b'] + 2 + >>> stack['c'] + 2 + >>> len(stack) + 3 + >>> stack.push(dict(a=3)) + >>> stack['a'] + 3 + >>> set(stack.keys()) == set(['a', 'b', 'c']) + True + >>> set(stack.items()) == set([('a', 3), ('b', 2), ('c', 2)]) + True + >>> dict(**stack) == dict(stack) == dict(a=3, c=2, b=2) + True + >>> d = stack.pop() + >>> stack['a'] + 2 + >>> d = stack.pop() + >>> stack['a'] + 1 + >>> stack.get('b', None) + >>> 'c' in stack + True + """ + + def __iter__(self): + dicts = list.__iter__(self) + return iter(set(itertools.chain.from_iterable(c.keys() for c in dicts))) + + def __getitem__(self, key): + for scope in reversed(tuple(list.__iter__(self))): + if key in scope: + return scope[key] + raise KeyError(key) + + push = list.append + + def __contains__(self, other): + return collections.abc.Mapping.__contains__(self, other) + + def __len__(self): + return len(list(iter(self))) |