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authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/setuptools/_itertools.py
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diff --git a/env/lib/python3.10/site-packages/setuptools/_itertools.py b/env/lib/python3.10/site-packages/setuptools/_itertools.py
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+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