Python 3 knowledge assert usage

Source: Internet
Author: User

The assert statement is also available in C or C ++. Short assertions. The following is a description from Python help document:

Assert statements are a convenient way to insert debugging assertions into a program:

An assert statement is used to insert a debugging breakpointProgramIs a convenient way.

 

Format of the assert statement

 
AssertExpression

This statement is equivalent to the following sentence:

 
If _ Debug __:If NotExpression:RaiseAssertionerror

 

Assert can also be used for assertions of multiple expressions.

 
AssertExpression1, expression2

 

I wrote an example of assert usage for prime number determination.

DefIsprime (n ):"""This function return a number is a prime or not"""AssertN> = 2FromMathImportSQRTForIInRange (2, INT (SQRT (N) + 1):IfN % I =0:ReturnFalseReturnTrue

 

Assert is easy to use and can avoid unnecessary unknown errors.

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