Write a program to read and parse the “From” lines and pull out the email addres

Question

Write a program to read and parse the “From” lines and pull out the email addresses from the line. Count the number of messages from each person using a dictionary. After all the data has been read, print the person with the most commits by creating a list of (count, email) tuples from the dictionary. Then sort the list in reverse order and print out the person who has the most commits.

Sample Line:

From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008

Sample Execution:

Enter a file name: mbox-short.txt

cwen@iupui.edu 5

Enter a file name: mbox.txt

zqian@umich.edu 195

(USE PYTHON)

Explanation / Answer

def max_mail():

   f = raw_input('Enter a file: ')
   opf = open(f)
   mail_list = []
   mail_dict = {}

   for line in opf:

       if line.startswith('From '):
           mail_list = line.split()
           mail_dict[mail_list[1]] = mail_dict.get(mail_list[1], 0) + 1

   m_list = []

   for mail, number in mail_dict.items():

       m_list.append((number, mail))

   m_list.sort(reverse = True)

   print(m_list[0])

if __name__ == '__main__':
       max_mail()

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