Python Exception handling

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

Try-except Detecting anomalies

Format

try:    try_statementexcept (ErrorType1, ErrorType2),e:    handle_statementfinally:    finally_statement

Instance

#!/usr/bin/pythontry:    a=12    b=0    c = a/bexcept Exception, e:    print  "Exception occurs: " , efinally:    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

with context_expr [asvar]:    with_statement

Raise throws an exception

Format

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

Instance

Raise Exception (' exampleexception ')

Assertion

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

Assert expression[, arguements]

Python Exception handling