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/
opt
/
alt
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python310
/
lib64
/
python3.10
/
importlib
/
metadata
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/opt/alt/python310/lib64/python3.10/importlib/metadata
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/opt/alt/python310/lib64/python3.10/importlib/metadata/_itertools.py
from itertools import filterfalse def unique_everseen(iterable, key=None): "List unique elements, preserving order. Remember all elements ever seen." # unique_everseen('AAAABBBCCDAABBB') --> A B C D # unique_everseen('ABBCcAD', str.lower) --> A B C D seen = set() seen_add = seen.add if key is None: for element in filterfalse(seen.__contains__, iterable): seen_add(element) yield element else: for element in iterable: k = key(element) if k not in seen: seen_add(k) yield element
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