对Python中内置异常层次结构详解

如下所示：

BaseException
+-- SystemExit
+-- KeyboardInterrupt
+-- GeneratorExit
+-- Exception
 +-- StopIteration
 +-- StandardError
 | +-- BufferError
 | +-- ArithmeticError
 | | +-- FloatingPointError
 | | +-- OverflowError
 | | +-- ZeroDivisionError
 | +-- AssertionError
 | +-- AttributeError
 | +-- EnvironmentError
 | | +-- IOError
 | | +-- OSError
 | |   +-- WindowsError (Windows)
 | |   +-- VMSError (VMS)
 | +-- EOFError
 | +-- ImportError
 | +-- LookupError
 | | +-- IndexError
 | | +-- KeyError
 | +-- MemoryError
 | +-- NameError
 | | +-- UnboundLocalError
 | +-- ReferenceError
 | +-- RuntimeError
 | | +-- NotImplementedError
 | +-- SyntaxError
 | | +-- IndentationError
 | |   +-- TabError
 | +-- SystemError
 | +-- TypeError
 | +-- ValueError
 |   +-- UnicodeError
 |    +-- UnicodeDecodeError
 |    +-- UnicodeEncodeError
 |    +-- UnicodeTranslateError
 +-- Warning
  +-- DeprecationWarning
  +-- PendingDeprecationWarning
  +-- RuntimeWarning
  +-- SyntaxWarning
  +-- UserWarning
  +-- FutureWarning
 +-- ImportWarning
 +-- UnicodeWarning
 +-- BytesWarning

想要捕获所有的异常，可以直接捕获 Exception 即可：

try:
...
except Exception as e:
...
log('Reason:', e)  # Important!

这个将会捕获除了 SystemExit 、 KeyboardInterrupt 和 GeneratorExit 之外的所有异常。 如果你还想捕获这三个异常，将 Exception 改成 BaseException 即可。

来源：https://blog.csdn.net/xiaodongxiexie/article/details/60779485