Python Tutorial 5.7 - Generators in Python

Welcome to the “Generators” tutorial!

Overview

Generators produce values one at a time using yield.

Syntax

def countdown(n):
    while n > 0:
        yield n
        n -= 1

Example

for num in countdown(5):
    print(num)

• Generates 5, 4, 3, 2, 1 lazily.

Benefits

• Save memory: values produced on demand.
• Ideal for large data streams.

Key Takeaways

• Use yield instead of return.
• Generator functions return generator objects.

Happy coding!