A concise introduction to exception handling in Python

The python exception handling mechanism is similar to Java, using the try-except-finally structure.

Try-except Detecting anomalies

Format
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Try
Try_statement
Except (ErrorType1, ErrorType2), E:
Handle_statement
Finally
Finally_statement

Instance
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#!/usr/bin/python
Try
A=12
B=0
c = A/b
Except Exception, E:
Print "Exception occurs:", E
Finally
Print "Finally handle!"

Context Manager (With...as ... Statement)

The WITH statement can be especially useful for scenarios where the resource is finally freed up, because it automatically frees the owning resource and does not need to be displayed to release the resource

Format
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With context_expr [as Var]:
With_statement

raise throws an exception

Format
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Raise exception[, args] or raise Exception (args)

Instance
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Raise Exception (' exampleexception ')

Assertion

Detecting key points of the program, triggering Asserterror (assertion error) when the assertion is unsuccessful
The format is as follows
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Assert expression[, arguements]

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