what is penspeed measured in python code example

Example 1: turtle circle() python

import turtle
t = turtle.Turtle()
t.color(color) # choose a color
t.begin_fill() # if you want it to be filled with color later
t.circle(10) # the function "circle" and the radious.
t.end_fill() # completing the filling of the circle. 
# try to do it and see if it works. it worked for me.

Example 2: how to setup Turtle python

import turtle
win = turtle.Screen()
win.bgcolor("black")
win.setup(Height=800, length=500)
win.title("setup")