Detailed explanation of Exception handling in Python

高洛峰
Release: 2017-03-08 09:59:17
Original
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About exception handling:

Class definitions in Python can be passed as objects. In the example, class B inherits the Exception class. In the loop, an exception class object B is raised each time. Except catches this exception and loops 3 times, so B B B is output.

Example:
class B(Exception): passclass C(B): passclass D(C): passfor cls in [B, C, D]: try: raise cls() except B: print ("B") except C: print("C") except D: print("D")

Execution result:
B
B
B

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