redirect prints to log file

Question

Okay. I have completed my first python program.It has around 1000 lines of code. During development I placed plenty of print statements before running a command

Answer 1

You can redirect replace sys.stdout with any object which has same interface as sys.stdout, in that object's write you can print to terminal and to file too. e.g. see this recipe http://code.activestate.com/recipes/119404-print-hook/

Answer 2

You should take a look at python logging module

---

EDIT: Sample code:

import logging

if __name__ == "__main__":
    logging.basicConfig(level=logging.DEBUG, filename="logfile", filemode="a+",
                        format="%(asctime)-15s %(levelname)-8s %(message)s")
    logging.info("hello")

Produce a file named "logfile" with content:

2012-10-18 06:40:03,582 INFO     hello