Exccessive completion of argument list for functions and properties

[MaksimZh]

Environment data

• VS Code version: 1.54.2
• Extension version: v2021.3.658691958
• OS and version: Windows 10 Pro
• Python version (& distribution if applicable, e.g. Anaconda): 3.9.1
• Type of virtual environment used: N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: Jedi

Expected behaviour

Completion of standard print function:
prin -> print or print()
Completion of NumPy array shape property:
a.shap -> a.shape

Actual behaviour

Completion of standard print function:
prin -> print(sep=..., end=..., file=..., flush=...)
Completion of NumPy array shape property:
a.shap -> a.shape(value)

[brettcannon]

I can verify this is happening if you use JediLSP as your language server (which you might be due to being in an experiment). If you opt out of the experiment or switch to Pylance this will go away.

[MaksimZh]

I confirm that either disabling experiments with "python.experiments.enabled": false or switching to Pylance eliminates this behavior in my setup.
Thanks!

[brettcannon]

And just as a follow-up, we are going to be upgrading our dependencies which will remove this behaviour (although it does mean the better feature set of Jedi won't be available under Python 2).

[karthiknadig]

This is fixed in the latest jedi-language-server. This PR will update the extension to use the latest one, in addition to falling back to old jedi for 2.7. #15734