# A python script which anonymizes email addresses in all files in current directory and sub-directories.
# e.g. A file with the following contents:

# siddhartha@gmail.com
# Sid Phn#- 6385833322
# gupta49@illinois.edu
# weee@as.cd
# sid@yahoo.co.in

# Would change to:

# xxxx@gmail.com
# Sid Phn#- 6385833322
# xxxx@illinois.edu
# xxxx@as.cd
# xxxx@yahoo.co.in

import os
import re
from os.path import join, getsize, isfile

def main():

    for root, dirs, files in os.walk('.'):
        for filename in files:
            if not filename.startswith('.'):
                filename = join(root, filename)
                myfile = open(filename, 'r')
                content = myfile.read()
                content = re.sub(r'.+(?=@.+\.(.+))', "xxxx", content)
                myfile = open(filename, 'w')
                myfile.write(content)
                myfile.close()

# Call the main function.
main()