.get() not retrieving value?

[deanhystad]

Doing my best to reconstruct your code I came up with this:

import tkinter as tk
import tkinter.ttk as ttk


def store_selected_value(event=None):
    grad_sel = gradient_dropdown.get()
    global stored_value
    stored_value= grad_sel
    print(f"Gradient: '{stored_value}'")


root = tk.Tk()
stored_value = None
column_frame = tk.Frame(root)
column_frame.pack(padx=50, pady=50)

gradient_value = ["0%","10%","15%","20%"]
gradient_dropdown = ttk.Combobox(column_frame, values=gradient_value, state="readonly")
gradient_dropdown.pack(pady=5)
gradient_dropdown.bind("<<ComboboxSelected>>", store_selected_value)

root.mainloop()

As I select the gradient values one at a time it prints:

Output:
Gradient: '0%'
Gradient: '10%'
Gradient: '15%'
Gradient: '20%'

The problem must be somewhere else in your code.