Create a 5 minute bucket histogram of input apache-style timestamps

ts-histo.py

import fileinput
from datetime import datetime

counts = dict()
for i in range(288):
    counts[i] = 0

for line in fileinput.input():
    dt = datetime.strptime(line.strip(), '%d/%b/%Y:%H:%M:%S')
    bucket = (dt.hour*60+dt.minute)/5
    counts[bucket] += 1

for k, v in counts.iteritems():
  print "%02i:%02i\t%i" % (k*5/60, k*5%60, v)