Deprecation warning in Jupyter notebook for use of ~ with Pandas series.

[billtubbs]

Environment data

• Pylance version: 2024.12.1
• OS and version: Ubuntu 22.04.3 in Docker, VSCode running on Windows 11
• Python version (& distribution if applicable, e.g. Anaconda): 3.10.12

Code Snippet

I am writing the following in a Jupyter notebook cell in VSCode:

np.sum(~data)

where data is a Pandas Series.

Repro Steps

This is quite hard to reproduce in any other notebook except here in the notebook where the screenshot below was taken. Other Pandas series in this notebook do not seem to have the same problem.

Expected behavior

I do not expect a deprecation warning since data is a Pandas series. As far as I know the use of the boolean negation operator is only being deprecated for Python bool types.

Actual behavior

This is formatted as shown in the following screenshot with a deprecation warning:

The warning says

The method "invert" in class "bool" is deprecated
Will throw an error in Python 3.14. Use not for logical negation of bools instead.

Strangely, if I add any command assigning to data prior to this cell, the strike-through formatting and deprecation warning goes away:

Hypothesis

It thinks data is a Python bool.

[rchiodo]

Thanks for the issue. We'd need the full notebook to reproduce. It sounds like the type of data is a bool but you're not expecting that.

[billtubbs]

Thanks, unfortunately it would be difficult to share the full notebook. I'll see if I can reproduce it in a notebook I could disclose.

The type of data is a Pandas series. See the output of print(type(data)) below the cell.

[rchiodo]

The runtime might end up with a different type than static analysis does. Usually that's because some function that produces data isn't typed, so Pylance can't determine the type correctly.