Python3 内置异常类型的结构:
BaseException
+--SystemExit
+--KeyboardInterrupt
+--GeneratorExit
+--Exception
+--StopIteration
+--StopAsyncIteration
+--ArithmeticError
| +--FloatingPointError
| +--OverflowError
| +--ZeroDivisionError
+--AssertionError
+--AttributeError
+--BufferError
+--EOFError
+--ImportError
| +--ModuleNotFoundError
+--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
