The correct answer is, use the validatecommand attribute of the widget. Unfortunately this feature is severely under-documented in the Tkinter world, though it is quite sufficiently documented in the Tk world. Even though it’s not documented well, it has everything you need to do validation without resorting to bindings or tracing variables, or modifying the … Read more
The padding options padx and pady of the grid and pack methods can take a 2-tuple that represent the left/right and top/bottom padding. Here’s an example: import tkinter as tk class MyApp(): def __init__(self): self.root = tk.Tk() l1 = tk.Label(self.root, text=”Hello”) l2 = tk.Label(self.root, text=”World”) l1.grid(row=0, column=0, padx=(100, 10)) l2.grid(row=1, column=0, padx=(10, 100)) app = … Read more
Why do you need to state both ‘x’ and ‘y’ before the ‘:’? Because a lambda is (conceptually) the same as a function, just written inline. Your example is equivalent to def f(x, y) : return x + y just without binding it to a name like f. Also how do you make it return … Read more
You should use destroy() to close a Tkinter window. from Tkinter import * #use tkinter instead of Tkinter (small, not capital T) if it doesn’t work #as it was changed to tkinter in newer Python versions root = Tk() Button(root, text=”Quit”, command=root.destroy).pack() #button to close the window root.mainloop() Explanation: root.quit() The above line just bypasses … Read more
One way is to stack the frames on top of each other, then you can simply raise one above the other in the stacking order. The one on top will be the one that is visible. This works best if all the frames are the same size, but with a little work you can get … Read more
Under Arch/Manjaro just install the package tk: sudo pacman -S tk
The Tkinter library is built-in with every Python installation. And since you are on Windows, I believe you installed Python through the binaries on their website? If so, Then most probably you are typing the command wrong. It should be: import Tkinter as tk Note the capital T at the beginning of Tkinter. For Python … Read more
Is there a way in which I can update the plot just by adding more point[s] to it… There are a number of ways of animating data in matplotlib, depending on the version you have. Have you seen the matplotlib cookbook examples? Also, check out the more modern animation examples in the matplotlib documentation. Finally, … Read more
I advocate an object oriented approach. This is the template that I start out with: # Use Tkinter for python 2, tkinter for python 3 import tkinter as tk class MainApplication(tk.Frame): def __init__(self, parent, *args, **kwargs): tk.Frame.__init__(self, parent, *args, **kwargs) self.parent = parent <create the rest of your GUI here> if __name__ == “__main__”: root … Read more
To get Tkinter input from the text box, you must add a few more attributes to the normal .get() function. If we have a text box myText_Box, then this is the method for retrieving its input. def retrieve_input(): input = self.myText_Box.get(“1.0”,END) The first part, “1.0” means that the input should be read from line one, … Read more