How to set python version? about doom-modeline

[seagle0128]

Did you set $PATH for Emacs correctly? Please check with M-x get-env RET PATH and S-M ! python --version RET.

[karambaq]

@seagle0128

python version says it 2.7.15

[seagle0128]

I believe Python 2.7 is used in your emacs env. You should use exec-path-from-shell on macOS to set env vars from shell correctly.

[karambaq]

Yes, it says 2.7.15

[karambaq]

unfortunately, can't make it work :(

[rmvn27]

I think it's happening, because in line 1154 it searches directy for the "python" executeable. So you would have to change it there directly to "python3".

[karambaq]

@r0m4n27 I set it like that:

(setq python-shell-interpreter "/usr/local/bin/python3"
      flycheck-python-pycompile-executable "/usr/local/bin/python3"
      python-shell-exec-path "/usr/local/bin/python3")

But modeline still showing 2.7.15 version :(

[seagle0128]

@karambaq I think you didn't get the point. The doom-modeline use python --version to get the version. If python is not in the $PATH of Emacs (not in shell), the version is not what you want. Per your description, both python and python3 are in your system. The simple way is make a link symbol for python3, and put it into /usr/local/bin. I don't use python-shell-interpreter since people may use ipython or something else.

Hope it's clear to you. Please close if it does work for you.

[seagle0128]

I'd like close it now since there is no more feedback. Please feel free to reopen if you still have any issue.

[bebound]

Thanks to #18 , (setq doom-modeline-python-executable "python3") should works.
However, on my Mac, it changes Python 2.7.10 to Python, the version disappears...

[seagle0128]

@bebound I guess Python2 is not in exec-path. Eval (executable-find doom-modeline-python-executable) in Emacs and check the output, please.

[bebound]

If I set the variable to python3, it outputs /usr/local/bin/python3. Otherwise, it outputs /usr/bin/python.

I'm using macOS and Spacemacs, 2.7.10 is the System Python, and I used homebrew to install 2.7.15 and 3.7.0. It seems that the $PATH in Emacs GUI is weird.

In shell, the $PATH is /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:.:/Users/kk/.gem/ruby/2.3.0/bin/
In emacs, M-x shell, $PATH is /usr/bin:/bin:/usr/sbin:/sbin:.:/Users/kk/.gem/ruby/2.3.0/bin/:.:/Users/kk/.gem/ruby/2.3.0/bin/, I don't know what prepend /usr/bin at the beginning.

[seagle0128]

You should set correct environment variables in Emacs. You can use exec-path-from-shell to import env vars from shell.

[bebound]

OK, I'll try this.
But after I set python-executable to python3, the version number disappears, is this correct? /usr/local/bin/python3 is python 3.7.0

[seagle0128]

@bebound I think you don't get the point. after (setq doom-modeline-python-executable "python3"), you still need to confirm if python3 is in exec-path and $PATH in emacs. Or you just use (setq doom-modeline-python-executable "/usr/local/bin/python3").

[bebound]

Ahh, I see, thank you.

[CruiseDevice]

I am using this in my init.el

(when (and (executable-find "python3")
             (string= python-shell-interpreter "python"))
    (setq python-shell-interpreter "python3"))

  ;; Env vars
  (with-eval-after-load 'exec-path-from-shell
    (exec-path-from-shell-copy-env "PYTHONPATH"))