Turtle
Turtle is a Python library for creating graphics and drawings through a simple, intuitive interface based on turtle graphics. It provides a virtual 'turtle' that moves around the screen, drawing lines as it goes, making it ideal for teaching programming concepts, especially to beginners. The library is included in Python's standard library, requiring no additional installation for basic use.
Developers should learn Turtle when teaching or learning programming fundamentals, such as loops, functions, and basic geometry, due to its visual and interactive nature. It's commonly used in educational settings, introductory coding courses, and for creating simple animations or drawings, as it helps visualize code execution and makes abstract concepts more tangible.