On 26/07/2013 11:37, Devyn Collier Johnson wrote: > > On 07/25/2013 09:54 AM, MRAB wrote: >> On 25/07/2013 14:42, Devyn Collier Johnson wrote: >>> If I execute a Python3 script with this haspling (#!/usr/bin/python3.3) >>> and Python3.3 is not installed, but Python3.2 is installed, would the >>> script still work? Would it fall back to Python3.2? >>> >> Why don't you try it? >> >>> I hope Dihedral is listening. I would like to see another response >>> from HIM. >>> >> > Good point, but if it falls back to Python3.2, how would I know? Plus, I > have Python3.3, 3.2, and 2.7 installed. I cannot uninstall them due to > dependencies.
Devyn, I'm not a *nix person so someone can point out if I'm wrong, but my understanding is that the shebang line (or whatever you want to call it) just tells the shell: run this command to run this file. So you can put "#!/usr/bin/fish-and-chips" as the first line and it will try to run the file using /usr/bin/fish-and-chips. If you put #!/usr/bin/python3.3 the shell will use the executable /usr/bin/python3.3. It doesn't know or care about Python or its versions: it won't go looking for some alternative binary. If /usr/bin/python3.3 isn't there, the shell will fail to run the code with some kind of error message. If you or your package manager symlink /usr/bin/python3 to whatever the latest Python 3.x is on your system then you can safely use /usr/bin/python3 throughout and let the symlink do the work! TJG -- http://mail.python.org/mailman/listinfo/python-list
