Name	Size	Mode	Actions
__pycache__/	-	0755	rm
_adapters.py	1862	0644	editdlrm
_collections.py	743	0644	editdlrm
_functools.py	2895	0644	editdlrm
_itertools.py	607	0644	editdlrm
_meta.py	1130	0644	editdlrm
_text.py	2198	0644	editdlrm
__init__.py	30596	0644	editdlrm

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