executing multiple functions in background simultaneously

MRAB google at mrabarnett.plus.com
Wed Jan 14 02:35:01 CET 2009

James Mills wrote:
> On Wed, Jan 14, 2009 at 11:02 AM, Catherine Moroney 
> <Catherine.M.Moroney at jpl.nasa.gov> wrote:
>> I would like to spawn off multiple instances of a function and run
>> them simultaneously and then wait until they all complete. 
>> Currently I'm doing this by calling them as sub-processes 
>> executable from the command-line.  Is there a way of accomplishing 
>> the same thing without having to make command-line executables of
>> the function call?
> Try using the python standard threading module.
> Create multiple instances of Thread with target=your_function 
> Maintain a list of these new Thread instnaces Join (wait) on them.
> pydoc threading.Thread
The disadvantage of threads in Python (CPython, actually) is that
there's the GIL (Global Interpreter Lock), so you won't get any speed
advantage if the threads are mostly processor-bound.

More information about the Python-list mailing list