Question

Here is my function

def f(task_list):
    results = []
    for task_id in task_list:
        results.append(work(task_id))
        print len(results) # show the progress
    return results

I use execfile() in ipython to run this function,
but it seems that the progress is showed
until the whole function ends

=======================
I tried again, it seems okay now…

Answer 1

try to force to flush stdout :

import sys
def f(task_list):
    results = []
    for task_id in task_list:
        results.append(work(task_id))
        print len(results) # show the progress
        sys.stdout.flush()  # this will force the system to display what is in the stdout queue
    return results