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import time
import sys
import itertools
from itertools import groupby
count = itertools.count(0)
def next_val():
return next(count) % 25
start_time = time.time()
letters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
# create an array of random strings of 40 characters each
l = sorted([''.join([letters[next_val()] for _ in range(40)]) for _ in range(10000)])
# group by the first two characters
g = {k: list(v) for k, v in groupby(l, lambda x: x[:2])}
if False:
pass # Breakpoint here
print('TotalTime>>%s<<' % (time.time() - start_time,))
print('TEST SUCEEDED')
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