Depending on system, python==python2 or python==python3.
Executable Python scripts, starts with:
#!/usr/bin/env python
#!/usr/bin/env python2
#!/usr/bin/env python3...
For python py3k it is provided in documentation I should/can use it with version number, so I do this:
#!/usr/bin/env python3
But I've found a problem with py2k scripts.
While in py2k documentation it is written to use : #! /usr/bin/env python ,
on some *nix-es python py3k is default, so python==python3. (For example ArchLinux python package , here python package files).
How to package (configure,make) and/or prepare python scripts for distribution to handle that ?
I ask about making software packages that can be run easily by users (without modyfing their environment)
Can I do the same trick for python py2k scripts as for python py3k scripts and set it as : #!/usr/bin/env python2 ?
Can I be sure that each python py2k distribution contains python2 file, so #!/usr/bin/env python2 will work ?
If yes, why it is not proposed as standard, for example in python py2k documentation ?
python2to run it (if it installed), and alwayes you can check the version withpython -V. if you want thatpythonwould be 2 or 3, you shouldrm /usr/bin/pythonand then create symlink that points from your desierd python version e.gln -s /usr/bin/python2.5 /usr/bin/python. – Hanan N. Dec 11 '11 at 10:36python2. I wonder why is it not standard to use it when there is py2k and py3k and defaultpythoncan differ. What about your advice about removing - it's not proper to this example, cause I ask about packaging. I'd like to make package that can run in different configurations/systems. No way about modifying environment. What about checking - it does not apply to Shebang - as far As I know. – Grzegorz Wierzowiecki Dec 11 '11 at 12:45#!...python2in your programs and if you are using Python 3.x, then use#!...python3. Don't rely on the operating system to have the right link if you know it will only work on a specific release. I work with systems which still have Python 1.5.2 installed as/usr/bin/python- I either write code to handle older Python releases or usepython2. – Arcege Dec 11 '11 at 18:07python2executable on my system (Debian squeeze).pythonis a symlink topython2.6, andpython3is a symlink topython3.1, but there is nopython2. – Gilles Dec 11 '11 at 23:07