June 2017
Beginner
320 pages
7h 37m
English
book
Learn Python 3 the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code
by Zed A. Shaw
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Exercise 17. More Files
Now let’s do a few more things with files. We’ll write a Python script to copy one file to another. It’ll be very short but will give you ideas about other things you can do with files.
ex17.py
1 from sys import argv 2 from os.path import exists 3 4 script, from_file, to_file = argv 5 6 print(f"Copying from {from_file} to {to_file}") 7 8 # we could do these two on one line, how? 9 in_file = open(from_file)10 indata = in_file.read()1112 print(f"The input file is {len(indata)} bytes long")1314 print(f"Does the output file exist? {exists(to_file)}")15 print("Ready, hit RETURN to continue, CTRL-C to abort.")16 input()1718 out_file = open(to_file, 'w')19 out_file ...
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