scheme_primitives.py 文件源码

def tscheme_speed(s):
    """Set the turtle's animation speed as indicated by S (an integer in
    0-10, with 0 indicating no animation (lines draw instantly), and 1-10
    indicating faster and faster movement."""
    check_type(s, scheme_integerp, 0, "speed")
    _tscheme_prep()
    turtle.speed(s)
    return okay