The assert statement checks a condition that you, the programmer, believe must be true at a certain point. If the condition is true, nothing happens and execution continues. If it is false, Python raises AssertionError. Assertions are a debugging aid: they catch impossible states early, close to their cause, instead of letting bad data travel further and fail somewhere confusing.
Free account
Keep reading for free
Create a free StudyToCert account to read the rest of this lesson: 5 more sections, 3 key terms, a real-world example, an exam tip and self-check questions. Every lesson, lab and practice test is free with an account.