assignment 10.1

fhand = open('mbox-short.txt')
counts = dict()
for line in fhand:
    if not line.startswith('From ') : continue
    pieces = line.split()
    email = pieces[1]
    counts[email] = counts.get(email,0) + 1
bigcount = None
bigword = None
for email,count in counts.items():
    if bigcount is None or count > bigcount:
        bigcount = count
        bigword = email
print bigword,bigcount