Python Assert will throw an error if a conditional does NOT equal True. This is most commonly used when debugging your code.

x = 5
assert x==5

Remember that a conditional is denoted by the double equals sign “==”

It is roughly similar to:

if not condition:
    raise AssertionError()

Let’s take a look at a python assert code sample

x = "Fall Colors"

assert x == "Fall Colors"

# Nothing happens

assert x == "Spring Rain"

# AssertionError is thrown

---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
<ipython-input-6-990283d4cfbb> in <module>
----> 1 assert x == "Spring Rain"
      2 
      3 # AssertionError is thrown

AssertionError: 

Link to code above

Check out more Python Vocabulary on our Glossary Page