Turtle._screen = _Screen()
File "/usr/lib/python3.7/turtle.py", line 3678, in init
_Screen._root = self._root = _Root()
File "/usr/lib/python3.7/turtle.py", line 434, in init
TK.Tk.init(self)
File "/usr/lib/python3.7/tkinter/init.py", line 2023, in init
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.
TclError: no display name and no $DISPLAY environment variable
