In Python, how can I open a file and read it on one line, and still be able to close the file afterwards?

Question

While working through this exercise I ran into a problem.

from sys import argv
from os.path import exists

script, from_file, to_file = argv
print \"Copying from         


        

Answer 1

in_file = open(from_file).read(); out_file = open(to_file,'w').write(in_file)