Cross-version extension modules?

[Peter Astrand]

On Wed, 28 Jan 2004, Pieter Claerhout wrote:

> extension modules in Python are always linked to a specific version of
> Python. You might perform some tricks with writing a pure Python module
> about your extension that, based on the version of the python interpreter,
> loads a different version of your extension. This is e.g. the way the Python
> drivers for SapDB work.

Thanks. Is PYTHON_API_VERSION guaranteed to increase only when the Python 
major or minor version increases, or can it change between micro versions 
as well?


/Peter
> -----Original Message-----
> From: Peter Astrand [mailto:peter at cendio.se] 
> Sent: 28 January 2004 10:40
> To: python-list at python.org
> Subject: Cross-version extension modules?
> 
> 
> 
> If I build a extension module with Python 2.2 and then loads it with 2.3, 
> I get:
> 
> RuntimeWarning: Python C API version mismatch for module _foo: This
> Python has API version 1012, module _foo has version 1011.
> 
> How fatal is this? Is it safe to use the module anyway? If not, is it
> possible to build the module differently, so that it actually is safe to
> use it with different versions of Python?
> 
> 

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