Fix Pylint warnings (#41644)
* Fix pylint warnings
Signed-off-by: Yuanyuan Chen <cyyever@outlook.com>
* More fixes
Signed-off-by: Yuanyuan Chen <cyyever@outlook.com>
* Raise with an exception
Signed-off-by: Yuanyuan Chen <cyyever@outlook.com>
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Signed-off-by: Yuanyuan Chen <cyyever@outlook.com>
