question about assertion

Question

I learn python at start ，and I don't know how to use assertion!

Answer 1

Assert instruction raises AssertionError exception depending on some condition.
In this example:

`assert 2 > 3, "Error!"`

you assert that two is greater than three. This assertion fails and exception with "Error!" text is raised.

Assertion is commonly used in testing. You won't use it often.

Answer 2

Wow, thanks very much,I know what is assert and i konw it is not often to be used