Python Turtle中circle()方法radius参数的计量单位是什么？

Great question—let’s get this sorted out for you! When you run that code snippet:

import turtle
myTurtle = turtle.Turtle()
myTurtle.circle(50)

the radius parameter here is measured in pixels, not inches.

Here’s a quick breakdown to confirm:

• The turtle graphics library operates on screen-based coordinates, where each unit directly corresponds to one pixel on your display. There’s no native support for physical units like inches—those would require manual conversion based on your screen’s DPI, which the library doesn’t track automatically.
• As a quick test, try adjusting the radius value (say, 100 instead of 50) and run the code again. You’ll see the circle’s size doubles relative to your screen, which lines up perfectly with pixel-based measurements.

Quick side note: The circle’s starting position or orientation might shift based on the turtle’s current heading, but the radius unit stays consistent as pixels across all standard turtle implementations.

内容的提问来源于stack exchange，提问作者Goktug