flake8

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pip install flake8
flake8 --max-line-length=120 project_0
# 忽略掉 E501,E302,E122,E225,E303,W291,E221,E231
flake8 --max-line-length=120 --ignore=E501,E302,E122,E225,E303,W291,E221,E231 project_0

# 只检查 F821 undefined name
flake8 --select=F821 /path/to/project_0