getFTP.py

import ftplib
import os
import socket
HOST = 'ftp.mozilla.org'
DIRN = 'pub/mozilla.org/webtolls'
FILE = 'bugzilla-LATEST.tar.gz'

def main():

    try:
        f = ftplib.FTP(HOST)
    except (socket.error, socket.gaierror) as e:
        print('ERROR: cannot reach "%s"' % HOST)
        return
    print('*** Connected to host"%s"' % HOST)

    try:
        f.login()
    except ftplib.error_perm:
        print('ERROR: cannot login anonymously')
        f.quit()
        return
    print('*** Logged in as "anonymous"')

    try:
        f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write)
    except ftplib.error_perm:
        print('ERROR: cannot read file "%s"' % FILE)
        os.unlink(FILE)
    else:

        print('*** Download "%s" wo CWD' % FILE)
    f.quit()

if __name__ == '__main__':
    main()