How to update a label in Tkinter

Question

How would I go about updating the numpy arrays as labels on my Tkinter application?

Code is following:

from tkinter import *
import tkinter as tk
import numpy as np

# General Tkinter setup
root = Tk()
root.title("Scale Widget")
root.geometry('600x400')
# This is the creation of the sliders
slider1 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider1.pack()
slider2 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider2.pack()
slider3 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider3.pack()
slider4 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider4.pack()
slider5 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider5.pack()
slider6 = Scale(root, from_=0, to=255, resolution=2, orient=HORIZONTAL)
slider6.pack()
# This is the collation of the NumPy array
numpyvalueupper = np.array([slider1.get(), slider2.get(), slider3.get()])
numpyvaluelower = np.array([slider4.get(), slider5.get(), slider6.get()])
# Help Here please!
label = tk.Label(root, text=numpyvalueupper, bg="blue", fg="white")

print (numpyvalueupper)
print (numpyvaluelower)

root.mainloop()

Answer 1

On creation of a tk label you can input a tk.StringVar and set that text to your numpy array. Here is a little example.

import tkinter as tk
import numpy as np


def updateLabel(e):
    numpyvalueupper = np.array([slider1.get(), slider2.get(), slider3.get()])
    numpyvaluelower = np.array([slider4.get(), slider5.get(), slider6.get()])
    # Just add these together for an example...
    textvar.set(str(numpyvaluelower + numpyvalueupper))

# General Tkinter setup
root = tk.Tk()
root.title("Scale Widget")
root.geometry('600x400')
# This is the creation of the sliders
slider1 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider1.pack()
slider2 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider2.pack()
slider3 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider3.pack()
slider4 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider4.pack()
slider5 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider5.pack()
slider6 = tk.Scale(root, from_=0, to=255, resolution=2, orient=tk.HORIZONTAL, command=updateLabel)
slider6.pack()

# Help Here please!
textvar = tk.StringVar()
label = tk.Label(root, textvariable=textvar, bg="blue", fg="white")
label.pack()
textvar.set(str(np.array([slider1.get(), slider2.get(), slider3.get()])))


root.mainloop()

Careful with your imports up top there. You don't need both tkinter imports statements and should just use one format.