Black inside Vim does not work

[A-tA-v]

Describe the bug

Installed psf/black Vim plugin using Vundle.
Installation went smoothly.
However, I get a bug upon formatting a Python file.
Tried with and without the following line in .vimrc:

let g:black_use_virtualenv = 0

Both variants give the same error.

To Reproduce

From inside Vim editor trying to format the current buffer: 
:Black

The resulting error is:

Error detected while processing /home/my-name/.vim/bundle/black/autoload/black.vim:
line  222:
Traceback (most recent call last):
  File "<string>", line 122, in <module>
ModuleNotFoundError: No module named 'black'
Error detected while processing function black#Black:
line   10:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'Black' is not defined
Press ENTER or type command to continue

Expected behavior

Expect file formatted.

Environment

• Black's version:
• OS and Python version:

Black 23.3.0
Ubuntu 20.04
Python 3.9 (note, default Python is 3.8 but 3.9 is also installable)
Vim is launched in terminal inside my virtual environment.
Black is installed in that virtual environment:

pip3 install black[d]

Currently, I am using the following command in .vimrc:

let g:black_use_virtualenv = 0

assuming that no additional virtual environment is installed by psf plugin,
rather mine environment is being used.

Additional context

[metov]

ModuleNotFoundError sounds like it's not using the same env after all. Does vim have a way of listing packages in its env or showing their paths? You could use that to figure out which Python it's using, and then just do /path/to/python -m pip install black to be done with it.

Looking at

black/plugin/black.vim

Lines 35 to 37 in eb32729

	let g:black_virtualenv = "~/.local/share/nvim/black"
	else
	let g:black_virtualenv = "~/.vim/black"

, it sounds like you should find a Python env in ~/.local/share/nvim/black or ~/.vim/black?

[A-tA-v]

It turns out the problem happens on Ubuntu, but not on Mac OS (just tried on OSX and it works).

Please wait, one time setup for Black.
Creating a virtualenv in /home/my-name/.vim/black...
(this path can be customized in .vimrc by setting g:black_virtualenv)
Installing Black with pip...
DONE! You are all set, thanks for waiting ✨ 🍰 ✨
Pro-tip: to upgrade Black in the future, use the :BlackUpgrade command and restart Vim.
Error detected while processing /home/my-name/.vim/bundle/black/autoload/black.vim:
line  222:
Traceback (most recent call last):
  File "<string>", line 122, in <module>
ModuleNotFoundError: No module named 'black'
Error detected while processing function black#Black:
line   10:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'Black' is not defined
Press ENTER or type command to continue

[A-tA-v]

The psf/black plugin uses a separate virtual environment while my environment already has Black installed.
This makes the installation process more complicated.
The following plugin invokes the default Black as a backend without any issues:
https://github.com/vim-autoformat/vim-autoformat

[hauntsaninja]

Closing as a duplicate of #2547