[Python-Dev] Re: "groupby" iterator
Greg Ewing
greg at cosc.canterbury.ac.nz
Wed Dec 3 22:22:49 EST 2003
Greg Ball <gball at cfa.harvard.edu>:
> (x[1] for x) == lambda x:x[1]
> (x.score for x) == lambda x: x.score
> (x+y for x,y) == lambda x,y: x+y
> (len(x) for x) == lambda x,len=len: len(x) # roughly equivalent
Interesting idea, but it reads a bit strangely.
Maybe this would work better with a different keyword...
x[1] given x
x.score given x
x+y given x,y
len(x) given x
stuff = groupby((x for x in seq), key = (x.score given x))
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. |
greg at cosc.canterbury.ac.nz +--------------------------------------+
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