I have tried a lot of different things but nothing has worked so far.
I am trying to a Label(l1) increase or decrease by one each time the "+1"(b1) or "-1"(b2) button is pressed. But at the moment the Label just sits there and does nothing.
Here is the code in it's basic form without trying to update the label:
from tkinter import *
root = Tk()
p1 = 0
l1 = Label(root, textvariable = p1)
f1 = Frame(root)
b1 = Button(root, text = "+1", command = p1 + 1)
b2 = Button(root, text = "-1", command = p1 - 1)
l1.grid(row=0, column=0)
f1.grid(row=1, column=0)
b1.pack(side="top")
b2.pack(side="top")
root.mainloop()
There are several problems in your code:
command option of a Button takes a function and p1 +/- 1 is not a function.textvariable option of a Label takes a Tkinter variable, usually a StringVar, but here an IntVar is more appropriate.pack and grid in root, which is not possible.To do what you want, you nedd to define two functions, one that increases the value of the IntVar by 1 and the other that decreases it. Then, pass the functions to the command option of the buttons and pass the IntVar to the textvariable argument of the label:
import tkinter as tk
def increase():
p1.set(p1.get() + 1)
def decrease():
p1.set(p1.get() - 1)
root = tk.Tk()
p1 = tk.IntVar(root, 0)
l1 = tk.Label(root, textvariable=p1)
b1 = tk.Button(root, text="+1", command=increase)
b2 = tk.Button(root, text="-1", command=decrease)
l1.pack()
b1.pack()
b2.pack()
root.mainloop()
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