How do I make lines by clicking, dragging and releasing the mouse on Tkinter?

I think the easiest way to achieve what you want is to create a line when you click, then change the coordinates while dragging and keep it when you release.If you simply make a new line for every click and update the coordinates on drag, you don't even need the release event:

import Tkinter as tkroot = tk.Tk()canvas = tk.Canvas(root, bg="white", width=600, height=400)canvas.pack()coords = {"x":0,"y":0,"x2":0,"y2":0}# keep a reference to all lines by keeping them in a list lines = []def click(e):    # define start point for line    coords["x"] = e.x    coords["y"] = e.y    # create a line on this point and store it in the list    lines.append(canvas.create_line(coords["x"],coords["y"],coords["x"],coords["y"]))def drag(e):    # update the coordinates from the event    coords["x2"] = e.x    coords["y2"] = e.y    # Change the coordinates of the last created line to the new coordinates    canvas.coords(lines[-1], coords["x"],coords["y"],coords["x2"],coords["y2"])canvas.bind("<ButtonPress-1>", click)canvas.bind("<B1-Motion>", drag) root.mainloop()

In this solution you will be able to draw lines and get its coordinates too

import tkinter as tkroot = tk.Tk()canvas = tk.Canvas(root, bg="white", width=600, height=400)canvas.pack()coords = {"x":0,"y":0,"x2":0,"y2":0}final=[]lines = []def click(e):    coords["x"] = e.x    coords["y"] = e.y    lines.append(canvas.create_line(coords["x"],coords["y"],coords["x"],coords["y"]))def release(l):    lis=[]    lis.append(coords["x"]);lis.append(coords["y"]);lis.append(coords["x2"]);lis.append(coords["x2"])    final.append(lis)def drag(e):    coords["x2"] = e.x    coords["y2"] = e.y    canvas.coords(lines[-1], coords["x"],coords["y"],coords["x2"],coords["y2"])canvas.bind("<ButtonPress-1>", click)canvas.bind("<B1-Motion>", drag) canvas.bind('<ButtonRelease-1>', release)root.mainloop()print(final)

Very simple solution:

canvas = Canvas(bg="white", width=600, height=400)canvas.pack()store = {'x':0,"y":0,"x2":0,"y2":0} #store values in a map  x,y:start   x2,y2:end  def click(c):    store['x'] = c.x    store['y'] = c.ydef release(l):    store['x2'] = l.x    store['y2'] = l.y    draw() # Release the mouse and drawdef draw():    canvas.create_line(store['x'],store['y'],store['x2'],store['y2'])canvas.bind('<ButtonPress-1>', click)canvas.bind('<ButtonRelease-1>', release)mainloop()