Primitive logging functions in your python scripts that are buffered before will be printed on the stdout

example_debug.py

# Try to execute the script in two different modes to see the difference 
# 
# $ python log.py  | tee log
# <noting for a long time>
#
# $ python -u  log.py  | tee log
# my log message 0
#

import time

DEBUG = 0

def log(message):
    print message 

def debug(message):
    if DEBUG>0:
        log("debug[%2d]: " % DEBUG + message)

if __name__ == '__main__':
    for i in range(0,1000):  
        log("my log message " + str(i))
        time.sleep(1)
        debug("my debug message" + str(i))
        

		

Written for this blog entry:

My python script buffers the output and it causes delays before the text appiers on the console
http://rtomaszewski.blogspot.co.uk/2012/07/my-python-script-buffers-output-and-it.html