python print function in real time

Question

I recently switched OS and am using a newer Python (2.7). On my old system, I used to be able to print instantaneously. For instance, suppose I had a computationally intense

Answer 1

Try to call flush of stdout after the print

import sys

...
sys.stdout.flush()

Or use a command line option -u which:

Force stdin, stdout and stderr to be totally unbuffered.