Roel Schroeven wrote:
>Laszlo Zsolt Nagy wrote:
>
>
>>[EMAIL PROTECTED] wrote:
>>
>>
>>
>>>I've got a trouble, and i think that anybody there can help me
>>>
>>>I've got a python script which i distribute in somes packages for *nix.
>>>This script is full of python and need python 2.4 ! And i'd like to
>>>display a message when the user doesn't have a python2.4 version.
>>>
>>>
>>>
>>>
>>>>>import sys
>>>>>sys.version
>>>>>
>>>>>
>>'2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)]'
>>
>>
>
>Yes, but the problem is also that Debian (not only Sid, but also stable
>and testing) has python 2.4 but it is not the default, i.e.
>/usr/bin/python is a symlink to /usr/bin/python2.3 even if
>/usr/bin/python2.4 is available to.
>
>
Hmm.
Idea one:
Create a list of possible locations. First of all, use your PATH, and
then add common locations:
['/bin','/usr/bin','/opt/bin','/usr/local/bin'] # etc.
Then use a list of the possible executable names:
['python','python2.3','python2.4'] # etc
Finally using these combinations, execute each executeable with
python -V
and examine its output. This may work, but I'm affraid there is no
general solution.
The system administrator can install different python versions to
virtually any location.
But I don't think you should be affraid of that. If a system admin
installs different
versions into strange locations, then he will take the responsibility to
fix python programs
that need a specific version. But in most cases, looking for a python
executable
on your PATH should be enough; and it is the most I would expect from an
application. :-)
Last idea:
- create a configuration file that resides beside your Python program
- take the path to the good executeable there
- if the program was started with the wrong version, but you have
the path to the good one (from the config file), then re-execute
- otherwise print an error message telling the required version AND
how the user can set it up in the config file
Third idea (for Windows only): read available versions from the
registry. ;-)
Best,
Les
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