[Twisted-Python] Processes in Twisted, only possible to run external prog?

Gabriel Rossetti gabriel.rossetti at arimaz.com
Mon Sep 1 01:47:20 MDT 2008

glyph at divmod.com wrote:
> On 09:06 am, gabriel.rossetti at arimaz.com wrote:
>> http://www.biais.org/blog/index.php/2007/01/23/19-python-threads-and- 
>> oschdir
>> http://bugs.python.org/issue1367
>> so I need to use processes instead, as they each have their own 
>> current dir. The thing is that from what I understand, Twisted's 
>> process API is intended to be used with external executables only, 
>> correct? I wasn' t able to fins anything that allowed me to do stuff 
>> like I would using fork(). Should I just use python's fock() instead? 
>> Is it safe with Twisted?
> As it happens, "python" is an "external executable".  Here's an 
> example of spawning it in such a way as to make sure that sys.path is 
> set properly: 
> http://divmod.org/trac/browser/trunk/Epsilon/epsilon/process.py#L7
Ok, thanks
> However, Wine is also an external process.  Perhaps you just want to 
> spawn the Wine command-line using spawnProcess using the 'path' 
> parameter set to a directory that you have created in the main 
> process, then clean it up when the process exits?
> http://twistedmatrix.com/documents/8.1.0/api/twisted.internet.interfaces.IReactorProcess.spawnProcess.html 
mmmm, yes, that sounds nice, I'll try that, thanks!
> Using fork() in Python has a lot of confusing issues associated with 
> it unless you're going to exec() immediately afterwards.  You probably 
> want to stick to one of these other approaches.
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