How can I build vim with just python 3 support?

Question

I'm on Arch, and recently the vim-python3 and gvim-python3 packages were removed, so I'm working on building vim from source such that the :python command will act as python3. Specifically, I'm doing this so that the vim-jedi package will work properly. I tried changing the

--enable-pythoninterp=dynamic

flag in my PKGBUILD to

--disable-pythoninterp

but when I did vim --version after building and installing, it still showed

+python/dyn

Also, doing

:python import sys;print(sys.version)

showed python 2 still. What do I need to change to have only python 3?

Answer 1

Thanks to x33a on the Arch forums, I was able to solve my problem. (https://bbs.archlinux.org/viewtopic.php?pid=1596987#p1596987)

I changed the python 3 flag from

--enable-python3interp=dyanmic

to

--enable-python3interp

This resulted in only python 3 being available.

Answer 2

The problem was not in Vim's default Python interpreter.

The real root of the problem is that the last version of jedi-vim (0.7.0) was released in 2013 and did not work well with Python 3.

Since then Python 3 support in jedi-vim has been improved a lot. We (Arch users) asked jedi-vim to make a new release. 0.8.0 has been released and now it is in the Arch repo. Please remove the hacked Vim and update Arch. jedi-vim is supposed to work well now.

Moral of this story: do not try to add workarounds over workarounds. Try to find the real root of the issue and fix that. Work with upstream more actively. Do not be afraid to ask.