pandas: Argument missing for parameter "by"

[tekumara]

Environment data

• Language Server version: Pylance language server 2020.9.0 (pyright 60eb2cca)
• OS and version: macOS
• Python version (& distribution if applicable, e.g. Anaconda): pandas==1.1.1

Expected behaviour

No type error, as this is correct behaviour according to the pandas docs

Actual behaviour

Argument missing for parameter "by" [10,1]

Code Snippet / Additional information

import pandas as pd

arrays = [['Falcon', 'Falcon', 'Parrot', 'Parrot'],
          ['Captive', 'Wild', 'Captive', 'Wild']]
index = pd.MultiIndex.from_arrays(arrays, names=('Animal', 'Type'))
df = pd.DataFrame({'Max Speed': [390., 350., 30., 20.]},
                  index=index)
df

df.groupby(level=0).mean()

[jakebailey]

This issue has been fixed in version 2020.9.5, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#202095-16-september-2020