How can I use itertools.groupby()?
groups =  uniquekeys =  for k, g in groupby(data, keyfunc): groups.append(list(g)) # Store group iterator as a list uniquekeys.append(k)
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): for thing in group: print("A %s is a %s." % (thing, key)) print("")
for key, group in groupby(things, lambda x: x): listOfThings = " and ".join([thing for thing in group]) print(key + "s: " + listOfThings + ".")
This code snippet was collected from stackoverflow, and is licensed under CC BY-SA 4.0
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