Question

9.4 Write a program to read through the mbox-short.txt and figure out who has sent the greatest number of mail messages. The program looks for 'From ' lines and takes the second word of those lines as the person who sent the mail. The program creates a Python dictionary that maps the sender's mail address to a count of the number of times they appear in the file. After the dictionary is produced, the program reads through the dictionary using a maximum loop to find the most prolific committer. 1 name = input("Enter file:") 2 if len(name) < 1 : name = "mbox-short.txt" 3 handle = open(name)

Answer 1

Answer:

file = raw_input("Enter file:")

if len(file) < 1:
name = "mbox-short.txt"

fh = open(name)

from_lines = []
emails = {}

for line in fh:
line = line.rstrip()
if line.find('From ') == 0:
line = line.split(' ')
email = line[1]
if email not in emails:
emails[email] = 1
else:
emails[email] += 1

email = ''
count = 0

for key in emails:
if emails[key] > count:
count = emails[key]
email = key

print "%s %s" % (email, str(count))