How to use nb-black python cde formatter

[snippsat]

I am using a jupyter notebook on Ubuntu with python 3.7.7.

We have talk a lot about setup and environment in your previous Thread.
If you use Anaconda as in your other post,most remember to activate base.
Then test with pip -V and it should now point to the Anaconda placement.
Here a quick test on Windows now,could do the same on Linux no difference.

G:\Anaconda3
λ G:\Anaconda3\Scripts\activate

(base) G:\Anaconda3
λ pip -V
pip 20.0.2 from G:\Anaconda3\lib\site-packages\pip (python 3.7)

(base) G:\Anaconda3
λ pip install nb-black
Collecting nb-black
.....
Successfully built nb-black
Installing collected packages: nb-black
Successfully installed nb-black-1.0.7

(base) G:\Anaconda3
λ jupyter lab
[I 17:11:58.129 LabApp] JupyterLab extension loaded from g:\anaconda3\lib\site-packages\jupyterlab

So no have installed nb-black and start jupyter lab all in base environment.

Test

%load_ext lab_black  

def foo():
 return 42

thisdict = {"brand": "Ford", "model": "Mustang", "year": 1964, "brand": "Bmw", "model": "M3", "year": 1980} 

Run cell:

def foo():
    return 42


thisdict = {
    "brand": "Ford",
    "model": "Mustang",
    "year": 1964,
    "brand": "Bmw",
    "model": "M3",
    "year": 1980,
}

So if work as expected black dos it's job and formatting the code in NoteBook.