ex17.py

from sys import argv
from os.path import exists

script, from_file, to_file = argv

print(f"Copying from {from_file} to {to_file}")

indata = open(from_file).read()
print(f"The input file is {len(indata)} bytes long")

print(f"Does the output file exist? {exists(to_file)}")

out_file = open(to_file, 'w+').write(indata)
print("Alright, all done!")