Python search a file for text using input from another file

Question

I\'m new to python and programming. I need some help with a python script. There are two files each containing email addresses (more than 5000 lines). Input file contains em

Answer 1

Maybe I'm missing something, but why not use a pair of sets?

#!/usr/local/cpython-3.3/bin/python

data_filename = 'dfile1.txt'
input_filename = 'ifile1.txt'

with open(input_filename, 'r') as input_file:
    input_addresses = set(email_address.rstrip() for email_address in input_file.readlines())

with open(data_filename, 'r') as data_file:
    data_addresses = set(email_address.rstrip() for email_address in data_file.readlines())

print(input_addresses.intersection(data_addresses))