Difference between assert and raise in Python

March 17, 2022

Difference between assert and raise in Python

In this article you will learn once and for all the difference between assert and raise in Python, and also their applications in code.

Difference between assert and raise thumb

Hey you programmer, ok? Let’s learn more about assert and raise in the Python language!

Let’s talk about the raise first, this operator is used to call an Exception somewhere in the code

The exception will be invoked when the raise is executed, see this example:

x = 1

if(x == 1):
 raise Exception("X variable should not be 1")

When the conditional is computed as true, code execution will stop because of the Exception that raise broke out

Now let’s see the assert, in this statement a code expression is evaluated

If true, the code continues to run normally, but if false, an Exception is invoked.

See a practical example:

x = 1
 assert x == 2, "x must be 2"

Exception with assert is called AssertionError

And Which One Should We Choose?

We have two different approaches here, the assert in turn depends on a True or False to work

It will always check for such an operation to be performed

The raise can be executed at any time, not depending exclusively on a condition


In this article we learned the difference between assert and raise in Python

The assert statement will always depend on a conditional to invoke an exception

In the case of a raise, we can call an Exception whenever it is relevant

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