Re: multiple versions of python

[Boruch Baum <boruch_baum@gmx.com>]

Thanks, Stanley!


On 01/04/2015 10:32 AM, Stanley C. Kitching wrote:
> 
> 
>> ....
>> 1] Can I have multiple versions of python simultaneously?
>> ....
> 
>   yes
> 
>   Using Debian Wheezy I have 3 python versions installed
> 
>     # ls -1 /usr/lib | grep python | grep -v lib
> 
>     python
>     python2.6
>     python2.7
>     python3
>     python3.2
> 
>     python  is python2.7
>     python3 is python3.2
>   
> ===========================================================
> 
>> 2] Is there a way to specify that one package 
>> use a non-default version of python ? 
>> ....
> 
>   yes
> 
>   Use the specific python version name
>   when starting your program
> 
>     pythonX.Y /path/to/zProgram.py
> 
>   For example, I have a small program
>   that only prints the current python version
>   that it has been started with .... 
> 
>   $ python $p/amisc/version.py
> 
>   python version .... 2.7.3
> 
>   $ python2.6 $p/amisc/version.py
> 
>   python version .... 2.6.8
>  
>   $ python2.7 $p/amisc/version.py
> 
>   python version .... 2.7.3
> 
>   $ python3 $p/amisc/version.py
> 
>   python version .... 3.2.3
> 
>   $ python3.2 $p/amisc/version.py
> 
>   python version .... 3.2.3
> 
> 
>   Using the name python is the same 
>   as using the name python2.7
> 
>     python2.7 is the default version
> 
>   Using the name python3 is the same
>   as using the name python3.2
> 
> ===========================================================
> 
>> 3] Is this a quick, straightforward install ? 
>> ....
> 
>   yes
> 
>   Use the Debian package manager
>   to install the different python versions
> 
>   # sudo apt-get install python
> 
>   # sudo apt-get install python3
> 
>   If you start your python programs
>   using specific python version names
>   nothing else should be necessary ....
> 
> 


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