from sys import argv
if len(argv) < 3:
    print("Usage:  python copy.py donor recipient")
    quit()

donor = argv[1]
recipient = argv[2]

fp_in = open(donor, "r")
fp_out = open(recipient, "w")

for line in fp_in:
    fp_out.write(line)

fp_in.close()
fp_out.close()

##  copy file donor to recipient
##  open the donor to read it.
##  open the recipient for writing
##  copy each line from the donor to the recipient
##  ensure both files are closed at the end.