gundlach at gmail.com
Fri Mar 12 00:16:36 CET 2010
I *know* this already exists, but I can't remember where:
def pivot(func, seq):
# I know, a good implementation shouldn't call func() twice per item
return ( (x for x in seq if func(x)), (x for x in seq if not
I feel like I read a thread in which this was argued to death, and I
can't find that either.
The scenario: I have a sequence of lines from a file. I want to split
it into those lines that contain a substring, and those that don't. I
want it to be more efficient and prettier than
with = [x for x in lines if substring in x]
without = [x for x in lines if substring not in x]
Does this exist?
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