turtle.tracer(n=None, delay=None) Parameters: n – nonnegative integer delay – nonnegative integer Turn turtle animation on/off and set delay for update drawings. If n is given, only each n-th regular screen update is really performed. (Can be used to accelerate the drawing of complex graphics.) When called without arguments, returns the currently stored value of n. Second argument sets delay value (see delay()). >>> screen.tracer(8, 25) >>> dist = 2 >>> for i

turtle.towards(x, y=None) Parameters: x – a number or a pair/vector of numbers or a turtle instance y – a number if x is a number, else None Return the angle between the line from turtle position to position specified by (x,y), the vector or the other turtle. This depends on the turtle’s start orientation which depends on the mode - “standard”/”world” or “logo”). >>> turtle.goto(10, 10) >>> turtle.towards(0,0) 225.0

turtle.title(titlestring) Parameters: titlestring – a string that is shown in the titlebar of the turtle graphics window Set title of turtle window to titlestring. >>> screen.title("Welcome to the turtle zoo!")

turtle.tiltangle(angle=None) Parameters: angle – a number (optional) Set or return the current tilt-angle. If angle is given, rotate the turtleshape to point in the direction specified by angle, regardless of its current tilt-angle. Do not change the turtle’s heading (direction of movement). If angle is not given: return the current tilt-angle, i. e. the angle between the orientation of the turtleshape and the heading of the turtle (its direction of movement). >>> turtle.reset()

turtle.tilt(angle) Parameters: angle – a number Rotate the turtleshape by angle from its current tilt-angle, but do not change the turtle’s heading (direction of movement). >>> turtle.reset() >>> turtle.shape("circle") >>> turtle.shapesize(5,2) >>> turtle.tilt(30) >>> turtle.fd(50) >>> turtle.tilt(30) >>> turtle.fd(50)

turtle.textinput(title, prompt) Parameters: title – string prompt – string Pop up a dialog window for input of a string. Parameter title is the title of the dialog window, propmt is a text mostly describing what information to input. Return the string input. If the dialog is canceled, return None. >>> screen.textinput("NIM", "Name of first player:")

turtle.stamp() Stamp a copy of the turtle shape onto the canvas at the current turtle position. Return a stamp_id for that stamp, which can be used to delete it by calling clearstamp(stamp_id). >>> turtle.color("blue") >>> turtle.stamp() 11 >>> turtle.fd(50)

turtle.st() Make the turtle visible. >>> turtle.showturtle()

turtle.speed(speed=None) Parameters: speed – an integer in the range 0..10 or a speedstring (see below) Set the turtle’s speed to an integer value in the range 0..10. If no argument is given, return current speed. If input is a number greater than 10 or smaller than 0.5, speed is set to 0. Speedstrings are mapped to speedvalues as follows: “fastest”: 0 “fast”: 10 “normal”: 6 “slow”: 3 “slowest”: 1 Speeds from 1 to 10 enforce increasingly faster animation of line drawing and turtle turni

turtle.showturtle() turtle.st() Make the turtle visible. >>> turtle.showturtle()