TLTR: Getting the following error while trying to display tkinter app on my local laptop (running Pop_OS!)
_tkinter.TclError: couldn't connect to display ":0"
Hello world,
First off: Im new to posting questions here so bear with me. If something about my questioning isn't right please tell me. Im also a fresh ubuntu user (for a few months now).
Now, onto my problem. When i try to display a tkinter application on my laptop i get the following error:
No protocol specified
No protocol specified
Traceback (most recent call last):
File "/home/lucenden/python/sublime/conversions/conversion_app.py", line 70, in
root = Tk()
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: couldn't connect to display ":0"
I tried looking into the problem but the only things related to my problem are from people using SSH to stream there application to a different display monitor, while im trying to display to my laptop its self.
The thing is, i fixed this problem before by applying some solutions i found online. But i dont know which of the solutions i tried actually did the job. Here is what i tried so far:
Install Xorg
Set $DISPLAY to: ":0:0" and "localhost:0:0"
Dig into tkinter file itsself (nothing useful there from what i can tell)
Turning laptop of and on, but only after applying all fixes at once...
Info about my system/environment:
Using Pop_OS! (Ubuntu dist) and Sublime Text to run the code
Running python3.7
Again, if ive left out any needed information please tell me. Thanks in advance!
My code:
from tkinter import *
from tkinter.colorchooser import askcolor
import sys
class App(Frame):
""" This is the class for our root window. """
def __init__(self, master=None):
Frame.__init__(self, master) # Parameters that you want to send through the Frame class.
self.master = master
self.default_bg = "#8f8f8f"
self.default_w = 0
self.default_h = 0
self.pack(fill=BOTH, expand=1)
# Creating a menu instance.
menu = Menu(self.master)
self.master.config(menu=menu)
# Create the File menu object. Then add a cascade to the menu bar.
file = Menu(menu)
# Add commands to the File menu, calling it something, and then specifying the command it runs.
file.add_command(label="Exit", command=self.app_exit)
file.add_command(label="Temp", command=self.do_nothing)
# Then add it to the menu bar.
menu.add_cascade(label="File", menu=file)
# Create the Astronomy menu object.
edit = Menu(menu)
# Add commands to the Astronomy menu, calling it something, and then specifying the command it runs.
edit.add_command(label="Clear Master", command=self.clear_master)
edit.add_command(label="Temp", command=self.do_nothing)
# Then add it to the menu bar.
menu.add_cascade(label="Edit", menu=edit)
self.init_app()
@staticmethod
def do_nothing():
print("Do nothing")
@staticmethod
def app_exit():
exit()
def clear_master(self):
""" Clear the master of any widgets on the screen. """
widget_list = self.master.winfo_children()
for widget in widget_list:
widget.pack_forget()
def track_mouse(self):
print("COME BACK TO track_mouse !!!!")
def scale(self):
scale = Scale(self.master, from_=0, to=10, orient=HORIZONTAL)
scale.grid()
def init_app(self):
canvas1 = Canvas(self, width=self.default_w, height=self.default_h)
canvas1.create_line(10, 0, 10, 600)
Scrollbar(canvas1)
button_1 = Button(self.master, text="Exit...", command=self.app_exit)
canvas1.pack()
button_1.pack()
root = Tk()
w = root.winfo_screenwidth()
h = root.winfo_screenheight()
root.geometry("%dx%d+0+0" % (w, h))
app = App(root)
root.mainloop()
_tkinter.TclError: couldn't connect to display– Zwinglian