Analysis of assert usage instances in python

This article mainly introduces the usage of assert in python. The example analyzes the functions and related usage skills of assert, which is of great practical value, you can refer to the following example to describe how to use assert in python. Share it with you for your reference. The specific analysis is as follows:

1. The assert statement is used to declare that a condition is true.

2. if you are very sure that a list you are using has at least one element, and you want to test this and cause an error when it is not true, the assert statement is an ideal statement applied in this case.

3. when the assert statement fails, an AssertionError is thrown.

Test procedure:

>>> Mylist = ['item'] >>> assert len (mylist) >=1 >>> mylist. pop () 'item' >>> assert len (mylist)> = 1 Traceback (most recent call last): File"

 
  
", Line 1, in

  
   
AssertionError >>>

  

 

I hope this article will help you with Python programming.