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authorHaoran S. Diao (刁浩然) <0@hairydiode.xyz>2023-07-05 04:53:17 -0700
committerHaoran S. Diao (刁浩然) <0@hairydiode.xyz>2023-07-05 04:53:17 -0700
commit7cd46f6842cc0e0c8279b1f1607d9ffb4acb9102 (patch)
treee4489aeaa83e3f944d70914689c4a02adb39a52f /e/lib/python3.11/site-packages/setuptools/_itertools.py
initial commit, includes venv
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diff --git a/e/lib/python3.11/site-packages/setuptools/_itertools.py b/e/lib/python3.11/site-packages/setuptools/_itertools.py
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+++ b/e/lib/python3.11/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