[Python-Dev] PYTHON3PATH

Michael Foord fuzzyman at voidspace.org.uk
Thu Jan 14 22:09:30 CET 2010

On 14/01/2010 21:02, Nick Coghlan wrote:
> However, I agree that that is a fairly unlikely scenario (since
> preinstalled Pythons tend not to rely on the e
Well, on the other hand I think that during the next few years it will 
be increasingly common for developers (and possibly users) to have 
Python 2 and Python 3 installed side-by-side.

Many libraries and applications may never make the jump to Python 3 and 
Python users may be using 'legacy' Python 2 code for many years to come. 
It will also become increasingly common for developers to be using 
Python 3 *primarily* and for Python 3 only libraries and applications to 

Whilst there are workarounds we *are* in a situation that Python 2 and 
Python 3 share environment variables for the location of libraries and 
executing code on startup, whilst at the same time they are largely 
incompatible and need separate library paths and startup code.



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