内建异常类的层次

BaseException+-- SystemExit+-- KeyboardInterrupt+-- GeneratorExit+-- Exception+-- StopIteration+-- StopAsyncIteration+-- ArithmeticError|    +-- FloatingPointError|    +-- OverflowError|    +-- ZeroDivisionError+-- AssertionError+-- AttributeError+-- BufferError+-- EOFError+-- ImportError+-- LookupError|    +-- IndexError|    +-- KeyError+-- MemoryError+-- NameError|    +-- UnboundLocalError+-- OSError|    +-- BlockingIOError|    +-- ChildProcessError|    +-- ConnectionError|    |    +-- BrokenPipeError|    |    +-- ConnectionAbortedError|    |    +-- ConnectionRefusedError|    |    +-- ConnectionResetError|    +-- FileExistsError|    +-- FileNotFoundError|    +-- InterruptedError|    +-- IsADirectoryError|    +-- NotADirectoryError|    +-- PermissionError|    +-- ProcessLookupError|    +-- TimeoutError+-- ReferenceError+-- RuntimeError|    +-- NotImplementedError|    +-- RecursionError+-- SyntaxError|    +-- IndentationError|         +-- TabError+-- SystemError+-- TypeError+-- ValueError|    +-- UnicodeError|         +-- UnicodeDecodeError|         +-- UnicodeEncodeError|         +-- UnicodeTranslateError+-- Warning+-- DeprecationWarning+-- PendingDeprecationWarning+-- RuntimeWarning+-- SyntaxWarning+-- UserWarning+-- FutureWarning+-- ImportWarning+-- UnicodeWarning+-- BytesWarning+-- ResourceWarning