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author | Biswakalyan Bhuyan <biswa@surgot.in> | 2022-11-13 23:46:45 +0530 |
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committer | Biswakalyan Bhuyan <biswa@surgot.in> | 2022-11-13 23:46:45 +0530 |
commit | 9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch) | |
tree | 0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/setuptools/_itertools.py | |
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Diffstat (limited to 'env/lib/python3.10/site-packages/setuptools/_itertools.py')
-rw-r--r-- | env/lib/python3.10/site-packages/setuptools/_itertools.py | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/setuptools/_itertools.py b/env/lib/python3.10/site-packages/setuptools/_itertools.py new file mode 100644 index 0000000..b8bf6d2 --- /dev/null +++ b/env/lib/python3.10/site-packages/setuptools/_itertools.py @@ -0,0 +1,23 @@ +from setuptools.extern.more_itertools import consume # noqa: F401 + + +# copied from jaraco.itertools 6.1 +def ensure_unique(iterable, key=lambda x: x): + """ + Wrap an iterable to raise a ValueError if non-unique values are encountered. + + >>> list(ensure_unique('abc')) + ['a', 'b', 'c'] + >>> consume(ensure_unique('abca')) + Traceback (most recent call last): + ... + ValueError: Duplicate element 'a' encountered. + """ + seen = set() + seen_add = seen.add + for element in iterable: + k = key(element) + if k in seen: + raise ValueError(f"Duplicate element {element!r} encountered.") + seen_add(k) + yield element |