This is my code :
import turtle
wn = turtle.Screen()
alex = turtle.Turtle()
alex.forward(50)
alex.left(90)
alex.forward(30)
wn.mainloop()
And my error is: "_Screen object has no attribute mainloop"
I tried to do just "mainloop" but then I got NameError while doing alex.mainloop gave same error i.e. turtle object has no attribute mainloop.
Googling told me that I might have my file name as turtle.py creating the conflict but that's not the case.