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I just followed these instructions to compile vim with python 3: https://github.com/Valloric/YouCompleteMe/wiki/Building-Vim-from-source

After the install I checked to see if I have python3:

vim --version | grep "python"

Which returned: 

+python3/dyn

and

+python/dyn

But when I start vim and type one of the followinf commands, I get a 0:

  • :echo has('python3/dyn')
  • :echo has('python3')
  • :echo has('python')
  • :echo has('python/dyn')

Has anyone had a similar problem?

EDIT: Hey guys lots of helpful comments, I just wanted to say thanks and let you guys know what I did to solve this. I followed the instruction again from the first link I provided but this time I removed vim.tiny and instead of trying to get vim to support both python2 and python3, I just build with python3 support. This fixed it

Typing

python3 print("works")

in vim, shows works. Typing

echo has('python3')

gives me an output of 1 and finally

vim --version | grep python3

Gives me a value of +python3

Thanks guys for all the help and suggestions!!

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4
  • Try running an actual Python command, e.g. :python print "works"; that's the best test (at least interactively; in a script I would prefer has('python'),which should work. – Ingo Karkat Sep 20 '16 at 16:09
  • If you're on Ubuntu, use pi-rho's PPA (launchpad.net/~pi-rho/+archive/ubuntu/dev). It has vim built with dynamic Python/Python3 support. – muru Sep 20 '16 at 18:11
  • It worked for me too! – Enlico Jun 8 '17 at 20:44
  • I had same problem and solved it by configuring the Vim just using with Python3 but without Python. – adembudak May 25 '20 at 1:36
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This is the expected result. There are no tests has('python/dyn') and has('python3/dyn'), only has('python') and has('python3').

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    still does not help if I do has('python3') or has('python'), i still get a 0 – user1314272 Sep 20 '16 at 10:19
  • The point is that you can't test for dynamic python with has() so… don't use has(). – romainl Sep 20 '16 at 11:55
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    @romainl Then why it is a documented feature that can be checked for with has() under :help feature-list? – jamessan Sep 20 '16 at 16:15
  • has('python') returns 1 for +python and +python/dyn. Same thing for has('python3') and +python3/+python3/dyn. Also, has('python/dyn') and has('python3/dyn') always return 0, whether the feature is there or not. Conclusion: either you can't use has() to determine if you have +python[3]/dyn or neither Sato Katsura nor me know how to format the argument properly. – romainl Sep 20 '16 at 16:25
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    Although, it would be useful for Vim to support the /dyn checks, especially since has('python') loads the Python library, which means you then can't use python3, and vice-versa. – jamessan Sep 20 '16 at 16:30

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