With Python 3.6 and the Turtle module, I would like to know how to print the coordinates of the turtle on screen.
My questions are: How do I print text on the screen, and how do I make that text the player's coordinates?
Here is my code.
from turtle import Turtle, Screenplay = Screen()play.bgcolor("black")play.screensize(250, 250)play.title("Turtle Keys")def position():coord = follow.coor()coord.color("white")coord.setposition(130, 100)run = Turtle("triangle")run.speed("fastest")run.color("white")run.penup()run.setposition(250, 250)print(position)Thank you.
Edit I tried write, but it throws a name not defined error.
Best Answer
Here is how you can write the turtle position on screen: the write method from the turtle module, must be called on a Turtle object.
import turtleplayground = turtle.Screen() # use nouns for objects, play is a verbplayground.bgcolor("black")playground.screensize(250, 250)playground.title("Turtle Keys")tom = turtle.Turtle() # use nouns for objects, run is a verbtom.color("white")tom.setposition(130, 100)tom.speed("fastest")tom.color("white")p = tom.pos() # here you get the coordinates of the turtletom.write(str(p), True) # and you print a string representation on screentom.penup()print(p) # this prints to the consoleplayground.exitonclick()
The way I approach this type of problem is to dedicate a turtle to each fixed label on the screen. That way you can permanentely locate a turtle at that position and simply do undo() to clear the old text followed by write() to write the new.
Here's a dynamic example where you can drag the turtle around the screen with your mouse and the current position will be written to the center of the screen:
from turtle import Turtle, ScreenFONT = ('Arial', 24, 'normal')playground = Screen()playground.setup(500, 500)playground.bgcolor("black")runner = Turtle("triangle")runner.color("white")runner.speed("fastest")runner.penup()runner.setposition(200, 200)marker = Turtle(visible=False) # our virtual magic markermarker.penup()marker.color("yellow")marker.write(runner.position(), align='center', font=FONT) # so we can undo itdef drag_handler(x, y):runner.ondrag(None) # disable handler while in handlermarker.undo() # erase previous positionmarker.write((x, y), align='center', font=FONT)runner.setheading(runner.towards(x, y)) # head towards new locationrunner.setposition(x, y)runner.ondrag(drag_handler)runner.ondrag(drag_handler)playground.mainloop()
Use the functions xcor() and ycor() to get coordinates. Use the function write() to write on the screen.
See documentation: https://docs.python.org/3/library/turtle.html
Maybe this will help:
def write_pos(self, position):self.pu()self.bk(len(str(position))-len(str(position))/2)self.pd()self.write(str(position))self.pu()self.fd(len(str(position))-len(str(position))/2)self.pd()write_pos(run, run.position())Ok. Here's the explanation.
So I defined a function writing the position of something (in this case, the turtle).
When I do:
self.pu()self.bk(len(str(position))-len(str(position))/2)I:
- Lift the pen up and
- Move backward some steps, so I can center the text.
I then do:
self.pd()self.write(str(position))Which:
- Puts the pen down and
- Writes (or outputs) the position
After that, when I do:
self.pu()self.fd(len(str(position))-len(str(position))/2)self.pd()I:
- Pick the pen up
- Move it back to the original position and
- Put the pen down again
EDIT:I just realized that you can do it a much more simple way of using write like this:
write(run.position(), False, center)It writes the turtles position, it doesn't move, and it still writes the text but with the canter as the place where it aligns.
EDIT #2:
I already figured out the problem.
Your using write directly and not actually calling it from the object. You should call write like this:
run.write(run.position(), align="center")