#!/usr/bin/env python3 import sys if __name__ == '__main__': if len(sys.argv) != 3: print(sys.argv[0], 'input_file output_file') sys.exit(1) ifile = open(sys.argv[1]).read() if ifile != 'This is a text only input file.\n': print('Malformed input') sys.exit(1) ofile = open(sys.argv[2], 'w') ofile.write('This is a binary output file.\n')