pyhonでgroupby from itertools import groupby things = [("animal", "bear"), ("animal", "duck"), ("plant", "cactus"), ("vehicle", "speed boat"), ("vehicle", "school bus")] for key, group in groupby(things, lambda x: x[0]): for thing in group: print "A %s is a %s." % (thing[1], key) pr
I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this: Take a list - in this case, the children of an...
pyhonでgroupby from itertools import groupby things = [("animal", "bear"), ("animal", "duck"), ("plant", "cactus"), ("vehicle", "speed boat"), ("vehicle", "school bus")] for key, group in groupby(things, lambda x: x[0]): for thing in group: print "A %s is a %s." % (thing[1], key) pr
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