Python Tkinter | Create different type of lines using Canvas class

Last Updated : 02 Nov, 2021

In Tkinter, Canvas.create_line() method is used to create lines in any canvas. These lines can only be seen on canvas so first, you need to create a Canvas object and later pack it into the main window.

Syntax:

Canvas.create_line(x1, y1, x2, y2, ...., options = ...)

Note: Minimum of 4 points are required to create a line, but you can also add multiple points to create different drawings.
Class parameters:

Data members used:
master
canvas
Member functions used for the given class: create() method
Widgets used: Canvas
Tkinter method used:
canvas.create_line()
pack()
title()
geometry()

Below is the Python code -

Python3

# Imports each and every method and class 
# of module tkinter and tkinter.ttk
from tkinter import *
from tkinter.ttk import * 

class GFG:
    def __init__(self, master = None):
        self.master = master

        # Calls create method of class GFG
        self.create()

    def create(self):

        # This creates a object of class canvas
        self.canvas = Canvas(self.master)

        # This creates a line of length 200 (straight horizontal line)
        self.canvas.create_line(15, 25, 200, 25)

        # This creates a lines of 300 (straight vertical dashed line)
        self.canvas.create_line(300, 35, 300, 200, dash = (5, 2))
        
        # This creates a triangle (triangle can be created by other methods also)
        self.canvas.create_line(55, 85, 155, 85, 105, 180, 55, 85)
        
        # This pack the canvas to the main window and make it expandable
        self.canvas.pack(fill = BOTH, expand = True)

if __name__ == "__main__":
    
    # object of class Tk, responsible for creating
    # a tkinter toplevel window
    master = Tk()
    geeks = GFG(master)

    # This sets the title to Lines
    master.title("Lines")

    # This sets the geometry and position of window
    # on the screen
    master.geometry("400x250 + 300 + 300")

    # Infinite loop breaks only by interrupt
    master.mainloop()

Output:

Example 2: For filing color in the shapes.

Python3

from tkinter import *
root=Tk()
root.title("canvas line")
root.geometry("555x555")
our_canvas=Canvas(root,width=300,height=200,bg="white")
our_canvas.pack()
#creating rectangle
our_canvas.create_rectangle(50,150,250,50,fill="blue")
root.mainloop()