Re: Create a new process to run python function

2010-05-05 Thread Christian Heimes

Am 05.05.2010 17:59, schrieb Benjamin Kaplan:

Multiprocessing wasn't added until Python 2.6.
http://www.python.org/dev/peps/pep-0371/

In Python 2.5, it was still a 3rd party package.
http://pypi.python.org/pypi/processing

The project's website appears to be down right now though.
http://developer.berlios.de/projects/pyprocessing


Why don't you try out our backport: 
http://pypi.python.org/pypi/multiprocessing/2.6.2.1 :)


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Re: Create a new process to run python function

2010-05-05 Thread Benjamin Kaplan
On Wed, May 5, 2010 at 10:33 AM, James Mills
 wrote:
> On Wed, May 5, 2010 at 10:56 PM, Massi  wrote:
>> in my script (python 2.5 on windows xp) I need to run a simple
>> function in a separate process. In other words I need something
>> similar to the fork function under UNIX. I tried with threads:
>
> Use the new multiprocesing package.
>
>> import os, threading
>>
>> def func(s) :
>>    print "I'm thread number "+s, os.getpid()
>>
>> threading.Thread(target=func, args=("1",)).start()
>> threading.Thread(target=func, args=("2",)).start()
>
> Like this:
>
> import multiprocessing
>
> multiprocessing.Process(target=func, args=("1",)).start()
> multiprocessing.Process(target=func, args=("2",)).start()
>
> ...
>
> Surprise surprise it has almost the same API
> as the threading module :)
>
> --James

Multiprocessing wasn't added until Python 2.6.
http://www.python.org/dev/peps/pep-0371/

In Python 2.5, it was still a 3rd party package.
http://pypi.python.org/pypi/processing

The project's website appears to be down right now though.
http://developer.berlios.de/projects/pyprocessing

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>
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Re: Create a new process to run python function

2010-05-05 Thread James Mills
On Wed, May 5, 2010 at 10:56 PM, Massi  wrote:
> in my script (python 2.5 on windows xp) I need to run a simple
> function in a separate process. In other words I need something
> similar to the fork function under UNIX. I tried with threads:

Use the new multiprocesing package.

> import os, threading
>
> def func(s) :
>    print "I'm thread number "+s, os.getpid()
>
> threading.Thread(target=func, args=("1",)).start()
> threading.Thread(target=func, args=("2",)).start()

Like this:

import multiprocessing

multiprocessing.Process(target=func, args=("1",)).start()
multiprocessing.Process(target=func, args=("2",)).start()

...

Surprise surprise it has almost the same API
as the threading module :)

--James
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Re: Create a new process to run python function

2010-05-05 Thread Christian Heimes

Joe Riopel wrote:

On Wed, May 5, 2010 at 8:56 AM, Massi  wrote:

but this does not work, since the two threads share the same pid. Can
anyone give me a suggestion?


Have you looked at os.fork ?
http://docs.python.org/library/os.html#os.fork


Fork on Windows XP? Have a lot of fun ... The NT Kernel has support for 
forking but neither the Win32 API nor Python supports it.


Christian

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Re: Create a new process to run python function

2010-05-05 Thread Joe Riopel
On Wed, May 5, 2010 at 8:56 AM, Massi  wrote:
> but this does not work, since the two threads share the same pid. Can
> anyone give me a suggestion?

Have you looked at os.fork ?
http://docs.python.org/library/os.html#os.fork
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Create a new process to run python function

2010-05-05 Thread Massi
Hi everyone,

in my script (python 2.5 on windows xp) I need to run a simple
function in a separate process. In other words I need something
similar to the fork function under UNIX. I tried with threads:

import os, threading

def func(s) :
print "I'm thread number "+s, os.getpid()

threading.Thread(target=func, args=("1",)).start()
threading.Thread(target=func, args=("2",)).start()

but this does not work, since the two threads share the same pid. Can
anyone give me a suggestion?
Thanks in advance.
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