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 emerge.

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.

Michael

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