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difference between turtle.Turtle() and x = turtle.Turtle()


By : fritz
Date : October 16 2020, 03:08 PM
wish help you to fix your issue In short, turtle.Turtle() is the constructor method of the class Turtle; it returns an instance of the class. If you don't assign the output to a variable, it basically creates an instance that is immediately discarded (that's not entirely true, as you could still access it with the special python variable _ right after that call.) When you type turtle.Turtle().forward(90), there's an implicit instance of the class that is created immediately "after" turtle.Turtle(), and the method forward() is called on that implicit instance. But since there's no reference to that implicit instance, it is eventually discarded by Python's garbage collector.
When you call bob = turtle.Turtle(), you are basically keeping a reference to the instance created (the reference is called bob). You can keep accessing the same instance by using the variable bob.
code :


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Turtle in python- Trying to get the turtle to move to the mouse click position and print its coordinates


By : FHussain
Date : March 29 2020, 07:55 AM
Hope this helps You are looking for onscreenclick(). It is a method of TurtleScreen. The onclick() method of a Turtle refers to mouse clicks on the turtle itself. Confusingly, the onclick() method of TurtleScreen is the same thing as its onscreenclick() method.
24.5.4.3. Using screen events
code :
>>> screen.onclick(turtle.goto) # Subsequently clicking into the TurtleScreen will
>>>                             # make the turtle move to the clicked point.
>>> screen.onclick(None)        # remove event binding again
screen.onscreenclick(turtle.goto)
def gotoandprint(x, y):
    gotoresult = turtle.goto(x, y)
    print(turtle.xcor(), turtle.ycor())
    return gotoresult

screen.onscreenclick(gotoandprint)
screen.onscreenclick(lambda x, y: turtle.goto(x, y) or print(turtle.xcor(), turtle.ycor())

Python Turtle - Error with turtle.begin_fill() and turtle.end_Fill()


By : user3171470
Date : March 29 2020, 07:55 AM
hope this fix your issue begin_fill and end_fill don't take any arguments. You can specify fill color as the second argument to turtle.color. Additionally, begin_fill and end_fill should go outside the loop, because they should be called once per polygon rather than once per line.
code :
side_number = int(input("How many sides should the polygon have?"))
side_length = int(input("How long should the sides be?"))
side_color = (input("What color should the sides be?"))
fill_color = (input("What color should fill the shape?"))
import turtle
wn = turtle.Screen()
john = turtle.Turtle()
john.color(side_color, fill_color)
john.begin_fill()
for i in range(side_number):
    john.forward(side_length)
    john.left(360/side_number)
john.end_fill()

Python turtle stamp mysteriously disappears after turtle shape's image manipulation


By : Michael Kornafel
Date : March 29 2020, 07:55 AM
Hope that helps The problem seems to be that by having individual counters for the different functions, you overwrite the files created by previous operations. Let's say you have a picture named test.gif and apply the flip transformation. The result will be saved as test.gif1.gif. If you now apply a rotate transformation, the rotated picture is also saved as test.gif1.gif, overwriting the existing file, and the previous picture disappears.
So one way to fix this bug is to use a single counter for all the pictures, instead of one per function, e.g. using itertools.count or just an int. This will also make your code somewhat shorter.
code :
import turtle
import tkinter
import tkinter.filedialog as filedialog
import itertools
from PIL import Image, ImageEnhance, ImageOps

count = itertools.count()
img = None

def turtleShape():
   global img
   klob = filedialog.askopenfilename()
   img = Image.open(klob)
   saveAndUpdate(img)

def turtleImageResize():
    def resize(img):
        picwidth = turtle.numinput('Width of Image', 'Set the width of the image: ', minval=1) or img.size[0]
        picheight = turtle.numinput('Height of Image', 'Set the height of your image: ', minval=1) or img.size[1]
        return img.resize((int(picwidth), int(picheight)), Image.ANTIALIAS)
    manipulate(resize)

def manipulate(function):
    global img
    if img:
        img = function(img)
        saveAndUpdate(img)
    else:
        print("No picture selected")

def flippic():
    manipulate(ImageOps.flip)

def mirror():
    manipulate(ImageOps.mirror)

def rotatePic():
    manipulate(lambda img: img.rotate(-90, expand=True))

def saveAndUpdate(img):
    name = "pic_" + str(next(count)) + ".gif"
    img.save(name, 'GIF')
    turtle.register_shape(name)
    turtle.shape(name)
    turtle.update()

def stampPic():
    turtle.stamp()
    turtle.penup()
    turtle.forward(200)
    turtle.pendown()

def settings():
    tkinter.Button(text="Set Turtle Image", command=turtleShape).pack(side='left')
    tkinter.Button(text="Stamp", command=stampPic).pack(side = 'left')
    tkinter.Button(text="Resize Turtle Image", command=turtleImageResize).pack(side='left')
    tkinter.Button(text="Flip image", command=flippic).pack(side='left')
    tkinter.Button(text="Mirror Image", command=mirror).pack(side='left')
    tkinter.Button(text="Rotate Image", command=rotatePic).pack(side='left')

def skip(x, y):
    turtle.penup()
    turtle.goto(x, y)
    turtle.pendown()
    turtle.update()

skip(-200, 100)
settings()
turtle.speed(0)
turtle.tracer(0, 0)
turtle.onscreenclick(skip)
turtle.mainloop()

Netlogo: How to make a patch find the closest turtle after its previous turtle died


By : Nat Wooding
Date : March 29 2020, 07:55 AM
seems to work fine Will this work? I have just moved the brackets so that the die is completed then the find
code :
to party-death
  ask parties [ if ( my-size = 0 and count parties > 2) [ die ] ]
  ask patches [set closest-party min-one-of parties [distance myself]]

How to record location of patches visited by a turtle in net logo, and reord data for each turtle


By : user3527230
Date : March 29 2020, 07:55 AM
To fix the issue you can do I haven't tested this, but it looks almost correct to me. In fact, I am surprised it didn't work (you didn't explain the problem). But instead of:
code :
set xy_list fput (list int xcor int ycor) xy_list
set xy_list fput patch-here xy_list
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