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alpham/pack.py

Created May 23, 2016 01:35
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pack.py
from itertools import groupby
def pack(arr):
uniqe_items = []
count_items = []
for i in groupby(arr):
if i[0] not in uniqe_items:
count_items.append(len(list(i[1])))
uniqe_items.append(i[0])
return ["{}:{}".format(num, count) for num, count in zip(uniqe_items, count_items)]
print pack([5, 5, 5, 7, 7, 3, 4, 7])
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