Language Servers complain 'Cannot access member "shape" for type "None"'

[kumkee]

Describe the bug

Language Servers, Pyright for example, complain Cannot access member "shape" for type "None"

Steps to reproduce the bug

are_table_rows: List[bool] = [True] * table.df.shape[0]

Pyright complains this line Cannot access member "shape" for type "None"

Expected behavior

The line above should pass all language server test.

Code

import camelot

@cache
def get_table_rows(table: Table) -> List[int]:
    """Get rows with table content."""
    are_table_rows: List[bool] = [True] * table.df.shape[0]
    for col_idx in (df := table.df):
        are_table_rows = [
            a and b for a, b in zip(are_table_rows, df[col_idx] != '')
        ]
    return [i for i in df.index if are_table_rows[I]]

Screenshots

Environment

• OS: Ubuntu 22.04.1 LTS
• Python version: Python 3.10.6
• Numpy version: 1.24.1
• OpenCV version: 4.7.0.68
• Ghostscript version: 9.55.0~dfsg1-0ubuntu5.1
• Camelot version: 0.10.1

Additional context

The pull request I proposed changing only one line of code should resolve this issue.