merits of Lisp vs Python

John J. Lee jjl at pobox.com
Wed Mar 14 21:22:47 CET 2007


"Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
> On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
[...]
> > mod_python relies on an unsupported feature of Python, namely
> > multiple interpreters --> risk of more pain with C extensions.
> 
> As usual, those bashing up on mod_python tend not to really know what
> they are talking about. :-(
> 
> Although multiple Python interpreters cannot be manipulated directly
> from within a Python script, they can from the Python C API and it is
> very much a feature of Python and has been for a long time.

I didn't dispute that multiple interpreters are a feature of Python.
I said that they are an unsupported feature -- at least, Martin
v. Loewis says they're "just broken", which is close enough for me:

http://groups.google.co.uk/group/comp.lang.python/browse_thread/thread/1ba97b5e088eb171/674accc133afbc96?rnum=2#674accc133afbc96

"""
In any case, it looks like that the "multiple interpreters" feature of
Python is just broken.
"""

[...]
> Even so, to get such a C extension module working in the context of
> mod_python simply means telling mod_python to run that particular
> application in the first interpreter instance by specifying the
> mod_python directive:
> 
>   PythonInterpreter main_interpreter
[...]

Is it possible to ask mod_python to start separate processes to serve
requests, rather than "separate" interpreters?  We couldn't see a way.


John



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