Multiple versions of Python coexisting in the same OS

[Edward Diener]

On 7/25/2010 10:03 AM, Thomas Jollans wrote:
> On 07/25/2010 02:46 PM, Edward Diener wrote:
>> The problem with this is that you forget that a script can invoke Python
>> internally. So whether one uses the console or file association method
>> of invoking Python externally, any already written script can use either
>> internally.
>
> Maybe it's just me, but I think that a script that does this is quite
> simply badly written: it *will* break on systems that have multiple
> Python versions.

Whether it is badly written or not in your opinion it is legal and 
happens all the time. Are you going to refuse to use any script, no 
matter for what library or for what purpose, that internally invokes 
Python either through a 'python' command or through a file with a Python 
extension ? And how would you find out if a script did this or not ? Are 
going to search every script in every distribution and library to 
determine if it does this ? And when you find out a script does this, 
what will you do ?

Be real. saying you do not like scripts that internally invoke Python 
does not solve anything if you have multiple coexisting versions of 
Python installed.