関連ワード:  exception handling class in python    error handling in classes python    exception handling class 12 python    explain important exception handling classes in python    exception handling class 12 python notes    exception handling in python class 12 questions and answers    exception handling in python class 12 pdf    exception handling in python class 12 notes pdf    exception handling in python class 12 important questions    exception handling in python class 12 questions and answers pdf