hourdistofday.py

name = input("Enter file:")
hours = dict()
if len(name) < 1 : name = "mbox-short.txt"
handle = open(name)
for line in handle:
    if not line.startswith("From "): continue
    hour = line.split()[5].split(':')[0] 
    hours[hour] = hours.get(hour, 0) + 1
for k, v in sorted(hours.items()):
    print (k,v)