automatic selection of python2 or python3 python enviorement per buffer on file load

[shackra]

Hello!

I hope this feature do not demand too much work for the developers. I am one of those many users who have both python2 and python3 interpreter installed on their system. This mean that python3 is linked to the python command, and I'm a guy that stills use python2.

Anyway, emacs-jedi, I think, should make available two types of python environments. One based on python2 and other based on python3. And should detect what environment to use at file load. That part shouldn't be hard since almost all python files have a shebang in the first line of the file. But a default environment should be used as default when no shebang or other possible sign to identify what python to use on that file is found.

cheers!

[tkf]

It is certainly doable but requires some code. The biggest problem is how to detect Python version from source code.

[shackra]

some people write #!/usr/bin/env python2 others #!/usr/bin/python2 and other write nothing. My guess is to start there...

[tkf]

Thinking outside the box, we can run two servers. One in Python 2 and the other in Python 3. Then mixing the result is not so hard. Since false positive is OK for auto completion, I see no problem with this method at this point.

[shackra]

It would be problematic for some packages? I can think of BeautifulSoup4, right now it was complaining about running the module for Python2 on Python3.

[tkf]

Jedi does not execute Python code at all. There is no way you see any warning.

[tkf]

@shackra @asmeurer If I were to make this change, I'd do it in Python side, not in Emacs.
See: davidhalter/jedi#385
Closing this issue.