FIX 'NoneType' object has no attribute 'isalpha' (#2440)

passerbya

2025-03-20 5ee2f382b32c5c0beaa1c133b466a100c6fb7ebc

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repos:
  - repo: https://github.com/psf/black
    rev: 24.4.0
    hooks:
      - id: black
        args: ['--line-length=100']  # 示例参数，black默认使用4个空格缩进