Tkinter problem

[Liya Ann Sunny]

I am using Colab. How could  solve this problem.
import tkinter as Tk
from tkinter import *
import sys
import os
#create main window
master = Tk()
master.title("tester")
master.geometry("300x100")


#make a label for the window
label1 = tkinter.Label(master, text='Hellooooo')
# Lay out label
label1.pack()

# Run forever!
master.mainloop()
The error shows that : 
<ipython-input-17-a60049376d65> in <module>()
      9 
     10 #create main window
---> 11 master = Tk()
     12 master.title("tester")
     13 master.geometry("300x100")

/usr/lib/python3.7/tkinter/__init__.py in __init__(self, screenName, baseName, className, useTk, sync, use)
   2021                 baseName = baseName + ext
   2022         interactive = 0
-> 2023         self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
   2024         if useTk:
   2025             self._loadtk()

TclError: couldn't connect to display ":0.0"