Python _tkinter.TclError: bad screen distance "0.5" using Turtle module - python-3.x

Question

I'm a turtle's beginner and I wrote a little program (file.py) who draws something.
But when I call the file with an import statement from another file (theotherfile.py. Note that it use tkinter), I have this error :
Traceback (most recent call last):
File "C:\Users\jeandubois\Documents\GitHub\myproject\theotherfile.py", line 443, in <module>
import theotherfile
File "C:\Users\jeandubois\Documents\GitHub\myproject\file.py", line 10, in <module>
turtle1 = turtle.Turtle()
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\turtle.py", line 3813, in __init__
Turtle._screen = Screen()
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\turtle.py", line 3663, in Screen
Turtle._screen = _Screen()
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\turtle.py", line 3689, in __init__
self._root.setupcanvas(width, height, canvwidth, canvheight)
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\turtle.py", line 438, in setupcanvas
self._canvas = ScrolledCanvas(self, width, height, cwidth, cheight)
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\turtle.py", line 343, in __init__
self._canvas = TK.Canvas(master, width=width, height=height,
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\tkinter\__init__.py", line 2685, in __init__
Widget.__init__(self, master, 'canvas', cnf, kw)
File "C:\Users\jeandubois\AppData\Local\Programs\Python\Python39\lib\tkinter\__init__.py", line 2569, in __init__
self.tk.call(
_tkinter.TclError: bad screen distance "0.5"
My code :
# file.py
import tkinter
root = tkinter.Tk()
[some awesome code]
root.mainloop()
# when closing root:
import theotherfile
# theotherfile.py
import turtle
turtle1 = turtle.Turtle()
turtle2 = turtle.Turtle()
turtle3 = turtle.Turtle()
turtle1.speed(100)
turtle2.speed(100)
turtle3.speed(100)
turtle1.width(5)
turtle2.width(5)
turtle3.width(5)
turtle1.color(choice(colors))
turtle2.color(choice(colors))
turtle3.color(choice(colors))
turtle1.up()
turtle2.up()
turtle3.up()
turtle1.goto(-100, -100)
turtle2.goto(0, -100)
turtle3.goto(-50, -13.4)
turtle1.down()
turtle2.down()
turtle3.down()
a = 100
for loop in range(2):
for loop2 in range(3):
turtle1.forward(a)
turtle1.left(120)
turtle2.forward(a)
turtle2.left(120)
turtle3.forward(a)
turtle3.left(120)
turtle1.color(choice(colors))
turtle2.color(choice(colors))
turtle3.color(choice(colors))
a = 50
turtle1.forward(50)
turtle2.forward(50)
turtle3.forward(50)
for loop in range(5):
turtle1.forward(a)
turtle1.left(120)
turtle2.forward(a)
turtle2.left(120)
turtle3.forward(a)
turtle3.left(120)
turtle1.color(choice(colors))
turtle2.color(choice(colors))
turtle3.color(choice(colors))
turtle1.right(60)
turtle2.right(60)
turtle3.right(60)
turtle1.forward(50)
turtle2.forward(50)
turtle3.forward(50)
turtle1.up()
turtle2.up()
turtle3.up()
turtle1.hideturtle()
turtle2.hideturtle()
turtle3.hideturtle()
turtle.mainloop()
I use Python 3.9.0 .
Can someone help me please ?