easy question on parsing python: "is not None"

Terry Reedy tjreedy at udel.edu
Fri Aug 6 20:20:45 CEST 2010

On 8/6/2010 5:27 AM, Richard D. Moores wrote:

> So there would be a different implementation for each operating
> system? One for Windows, one for linux? Or one for Vista and one for
> XP?  I'm just trying to clarify what is meant by "implementation".

Different version of CPython (that string caching bit has changed in the 
past) and CPython versus Jython, PyPy, IronPython, Cython, etc.

Terry Jan Reedy

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