Created
February 7, 2013 21:28
-
-
Save lambdamusic/4734404 to your computer and use it in GitHub Desktop.
Django: Remove duplicates from a list
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
def remove_duplicates(seq, idfun=None): | |
# order preserving | |
if idfun is None: | |
def idfun(x): return x | |
seen = {} | |
result = [] | |
for item in seq: | |
marker = idfun(item) | |
# in old Python versions: | |
# if seen.has_key(marker) | |
# but in new ones: | |
if marker in seen: continue | |
seen[marker] = 1 | |
result.append(item) | |
return result | |
>>> a=list('ABeeE') | |
>>> f5(a) | |
['A','B','e','E'] | |
>>> f5(a, lambda x: x.lower()) | |
['A','B','e'] |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment