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Add importlib-resources-5.2.2

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JonnyWong16 2021-10-15 00:51:58 -07:00
parent b09faab852
commit f238343aa2
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40 changed files with 1943 additions and 0 deletions
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19
lib/importlib_resources/_itertools.py Normal file
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@ -0,0 +1,19 @@
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