ImportError: cannot import name _remove_dead_weakref

[bearzyj]

Information that requested to open a LeaderF issue

• vim or neovim?

  • vim
  • neovim

• Output of vim --version or nvim --version: VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Nov 29 2017 18:37:46)

• Output of :echo has("python"): 1

• Output of :echo has("python3"): 0

• Output of :echo &pythondll(only vim, not neovim):/System/Library/Frameworks/Python.framework/Python

• Output of :echo &pythonthreedll(only vim, not neovim): (Nothing outputed)

• Output of :py print(sys.version): 2.7.10 (default, Oct 6 2017, 22:29:07)
  [GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.31)]

• Output of :py3 print(sys.version): E319: Sorry, the command is not available in this version

• Output of :echo g:Lf_Debug_Cmd:

• Operating system:

  • Linux
  • Mac OS X
  • Windows
  • Etc.

• Configurations related to LeaderF in vimrc: (No special configuration)

• Extra information
  macOS: High Sierra 10.13.6
  Used "brew install python2" and "brew install python3"
  Now run "brew list | grep python", could see "python" and "python@2"
  In bash, "python --version" is Python 2.7.15, "python3 --version" is Python 3.7.0

Describe your question, feature request, or bug.

When use "LeaderfFunction", it reports error:
Error detected while processing /Users/yingjzh2/.vim/bundle/LeaderF/autoload/leaderf/Function.vim:
line 14:
Traceback (most recent call last):
File "", line 1, in
File "/Users/yingjzh2/.vim/bundle/LeaderF/autoload/leaderf/python/leaderf/functionExpl.py", line 12, in
import multiprocessing
File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/init.py",
line 65, in
from multiprocessing.util import SUBDEBUG, SUBWARNING
File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/util.py", line
37, in
import weakref
File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/weakref.py", line 14, in
from _weakref import (
ImportError: cannot import name _remove_dead_weakref
Error detected while processing function leaderf#Function#startExpl[2]..leaderf#LfPy:
line 1:
Traceback (most recent call last):
File "", line 1, in
NameError: name 'functionExplManager' is not defined

Steps to reproduce

Just use vim-plugin install Leaderf, and then open vim, and try "LeaderfFunction"

Actual behaviour

Show python import errors

Expected behaviour

Show tags

[bearzyj]

So now in my macOS, there are 3 python:

• Apple-supplied: /usr/bin/python
• brew-installed : /usr/local/bin/python
• brew-installed : /usr/local/bin/python3

Manually tried and found that from _weakref import _remove_dead_weakref failed only with: "Apple-supplied: /usr/bin/python"

Considered that the vim is also Apple-supplied, so tried "py from _weakref import _remove_dead_weakref" also failed.

So, is there anyway to allow Apple-supplied vim (8.0) use brew-installed-python ?

[bearzyj]

Since in vim, echo &pythondll shows /System/Library/Frameworks/Python.framework/Python

I manualy set pythondll = '/usr/local/Cellar/python\@2/2.7.15_1/Frameworks/Python.framework/Python'

Then "py from _weakref import _remove_dead_weakref" still failed......

[Yggdroot]

This issue is not related to LeaderF, please google it to find the solution. For example, https://askubuntu.com/questions/981663/python2-7-broken-by-weakref-import-error-please-help.

[bearzyj]

@Yggdroot The way to solve it on macOS, could be "brew install vim".

However then, new problems happened without ctags.

Does LeaderF must work with "ctags" ? Can it works with "gtags" ?

Thanks.

[bearzyj]

Well, read "doc/leaderf.txt", from this section:

g:Lf_Ctags g:Lf_Ctags
Use this option to specify the ctags executable you use. If ctags is not
in one of the directories in your $PATH environment variable, you should
set it by yourself. e.g., >
let g:Lf_Ctags = "/usr/local/universal-ctags/ctags"
<
Default value is "ctags".

seems we must install ctags.

Tried let g:Lf_Ctags='/usr/local/bin/gtags', doesn't work.

Well. Thanks. This issue can be closed.
Just, if possible, please let LeaderF support gtags, then ctags can be uninstanlled.

[bearzyj]

Oh, my hope to let LeaderF support gtags is just the same as : #191