Modified version from https://gist.github.com/Azlirn/a7107212401f1865106a5e1476303f3e

string-eraser.py

import os
import time

# In the current configuration, this script should be able to process:
# 200,000 rps (records per second)


# GLOBAL VARIABLE

def rmDomain(oldfile, newfile, cropfile):
    start_time = time.time()
    hitcounter = 0
    pcounter = 0
    emailDomains = [line.rstrip('\n') for line in open(cropfile)]
    try:
        with open(oldfile) as oFile, open(newfile, 'w') as nFile:
            try:
                for line in oFile:
                    pcounter = pcounter + 1
                    lowerLine = line.lower()
                    if not any(domain in lowerLine for domain in emailDomains):
                        nFile.write(line)
                        hitcounter = hitcounter + 1
                print '\r[*] - {%s} records processed...' % (pcounter),
            
            except Exception as e:
                print '[!] Error Occurred: %s' % e
                #
                # Uncomment the below if you would like the script to restart to 'main' if it encounters an error
                #

                # print '[*] Restarting script...'
                # time.sleep(5)
                # reload(main())

    except Exception as e:
        print "[!] Error opening %s: %s" % (oldfile, e)
        print "[!] Ensure the file %s exists in your current directory." % oldfile
        print "[*] Also, check your spelling and be sure you add the extension to your file name!"
        time.sleep(5)
        reload(main())

    ctime = time.time() - start_time

    print '\n[*] === COMPLETE === [*]'
    print '[*] %s was saved' % newfile
    print '[*] There are %s records in your saved file.' % hitcounter
    print '[*] You processed %s total records.\n' % pcounter

    print "[*] === Completed in %s seconds === [*]" % ctime
    time.sleep(5)
    exit()


def main():

    os.system('cls' if os.name == 'nt' else 'clear')

    print '''

    ,--.                o         ,---.|         o
    |   |,---.,-.-.,---..,---.    `---.|--- ,---..,---.,---.,---.,---.
    |   ||   || | |,---|||   |        ||    |    ||   ||   ||---'|
    `--' `---'` ' '`---^``   '    `---'`---'`    `|---'|---'`---'`
                                                  |    |

    '''

    print '\n[!] Currently this script only supports stripping text files.\n'
    #TODO: Add flag to allow csv files to be processed
    print '[*] Thanks to leakedsource.com for providing an awesome list of domains to ignore.\n'

    oldfile = raw_input('{*} Enter the file (with extension) you would like to strip domains from: ')

    if oldfile == '':
        print '[!] You must define a filename'
        time.sleep(2)
        reload(main())

    newfile = raw_input('{*} Enter the name of the file (with extension) you would like me to save: ')

    if newfile == '':
        print '[!] You must define a filename'
        time.sleep(2)
        reload(main())

    cropfile = raw_input('{*} Enter the name of the file (with extension) including the cropwords: ')

    if cropfile == '':
        print '[!] You must define a filename'
        time.sleep(2)
        reload(main())

    raw_input("\n[!] Press any key to start...\n")

    rmDomain(oldfile, newfile, cropfile)

main()