broken with pandas completion

[petobens]

Consider the following minimal init.vim file:

let $DOTVIM = expand('$HOME/.config/nvim')

set runtimepath+=$DOTVIM/bundle/repos/github.com/Shougo/deoplete.nvim
set runtimepath+=$DOTVIM/bundle/repos/github.com/deoplete-plugins/deoplete-jedi
filetype plugin indent on

let g:deoplete#enable_at_startup = 1
let g:deoplete#sources#jedi#python_path = '/usr/bin/python'

Now do the following:

1. Open a foo.py with the following content:

   import pandas as pd

2. In a new line type pd.D then erase the .D and retype it (this seems to trigger jedi completion)
3. After 2. I get the following error:

   [deoplete] Traceback (most recent call last):
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/completion_cache.py", line 15,
   in _get_from_cache
   return _cache[module_name][name][number]
   KeyError: 'NamedAgg'
   During handling of the above exception, another exception occurred:
   Traceback (most recent call last):
   File "/home/pedro/.config/nvim/bundle/repos/github.com/Shougo/deoplete.nvim/rplugin/python3/deoplete/child.py", line 189, in _gather_results
   result = self._get_result(context, source)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/Shougo/deoplete.nvim/rplugin/python3/deoplete/child.py", line 249, in _get_result
   ctx['candidates'] = source.gather_candidates(ctx)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/sources/deoplete_jedi/profiler.py", line 37, in wrapp
   er
   return func(self, *args, **kwargs)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/sources/deoplete_jedi.py", line 195, in gather_candid
   ates
   return self.finalize_completions(completions)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/sources/deoplete_jedi/profiler.py", line 37, in wrapp
   er
   return func(self, *args, **kwargs)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/sources/deoplete_jedi.py", line 144, in finalize_comp
   letions
   out.append(self.parse_completion(c, tmp_filecache))
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/sources/deoplete_jedi.py", line 305, in parse_complet
   ion
   type_ = comp.type
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/classes.py", line 624, in type
   return completion_cache.get_type(
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/completion_cache.py", line 17,
   in _get_from_cache
   v = get_cache_values()
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/classes.py", line 627, in <lam
   bda>
   lambda: self._get_cache()
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/classes.py", line 616, in _get
   _cache
   super(Completion, self)._get_docstring_signature(),
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/classes.py", line 262, in _get
   _docstring_signature
   for signature in self._get_signatures(for_docstring=True)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/api/classes.py", line 504, in _get
   _signatures
   names = convert_names([self._name], prefer_stubs=True)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 138, in convert_names
   return _python_to_stub_names(names, fallback_to_python=prefer_stubs)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/utils.py", line 20, in w
   rapper
   return list(func(*args, **kwargs))
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 106, in _python_to_stub_names
   values = convert_values(n.infer(), only_stubs=True)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 148, in convert_values
   return ValueSet.from_sets(
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/common/value.py", line 32, in from
   _sets
   for set_ in sets:
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 149, in <genexpr>
   to_stub(value)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 170, in to_stub
   stub_module = _load_stub_module(value.get_root_context().get_value())
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/conversion.py",
   line 85, in _load_stub_module
   return _try_to_load_stub_cached(
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/typeshed.py", li
   ne 141, in _try_to_load_stub_cached
   _try_to_load_stub(inference_state, import_names, *args, **kwargs)
   File "/home/pedro/.config/nvim/bundle/repos/github.com/deoplete-plugins/deoplete-jedi/rplugin/python3/deoplete/vendored/jedi/jedi/inference/gradual/typeshed.py", li
   ne 153, in _try_to_load_stub
   if parent_module_value is None and len(import_names) > 1:
   TypeError: object of type 'NoneType' has no len()
   Error from jedi: object of type 'NoneType' has no len().  Use :messages / see above for error details.

   For the record I'm on arch linux using python3.8, pandas 1.0.1 and latest master versions of deoplete and deoplete-jedi

[Shougo]

OK. Reproduced. But this is not deoplete-jedi's issue. It is jedi's issue.

Please report it in jedi issues.

[petobens]

Do you mean in vim-jedi or in python jedi?

[Shougo]

python jedi.

[Shougo]

It seems not fixed in the latest jedi.

[petobens]

The issue is still open: https://github.com/davidhalter/jedi/issues/1506

[nraw]

is there a way to suppress it for now at least?

[Shougo]

- `g:deoplete#sources#jedi#ignore_errors`: Ignore jedi errors for completions.
  Default: `0`

Please read the documentation.

[petobens]

@Shougo this has been fixed in latest jedi... do you need to update the jedi submodule? (don't know if deoplete-jedi uses one)

[Shougo]

OK. I will try it.

[petobens]

Thank you