Appends specified string to every line in a file - made for adding domain to a company email list

bulktext_append.py

#!/usr/bin/python
# bulktext_append [ORIGINAL FILE] [SAVE FILE]

import sys

# Read in arguments for where to open and save the file
args = sys.argv

# Find what the user wants to add
append_text = input('Enter the string you would like to append to the text in quotations: ')

# Open original file with read permissions only
original_file = open(args[1], 'r')
original_file.close
original_text = original_file.read().splitlines()

# Clean the text from upper cases and spaces and append
new_text = [i.lower().replace(" ","") for i in original_text]
new_text = [i + append_text + '\n' for i in new_text]

# Write the modified text into a new file
new_file = open(args[2], 'w')
new_file.writelines(new_text)