Why is the program not running? Is there a logical or syntax problem?

[behi00]

Hello, I am an amateur programmer.
I wanted to know if my codes are correct?
And why is it not implemented?
Meanwhile, I wrote this program in the object-oriented method and in the tkinter framework.
thank you.

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import tkinter as tk

class Profit:
    def __init__(self, master):
        self.master = master
        master.title("Profit")
        # create the  pro field
        self.pro_label = tk.Label(master, text= "Interest rate:")
        self.pro_label.grid(row=0, column=0)
        # create the display
        self.display = tk.Entry(master, width=10, justify="center", font=("Arial", 10))
        self.display.grid(row=0, column=1)
        # create the  result field
        self.res_label = tk.Label(master, text="Result:")
        self.res_label.grid(row=1, column=0)
        # create and place the buttons on the grid
        self.calculate_button = tk.Button(master,text="Computing",command=self.calculate)
        self.calculate_button.grid(row=2, column=0)
      def rule(master):
      return 72/master

    def calculate(self):
                x = int(self.display.get())
                result = "Result:   " + self.rule()
                self.res_label.config(text=result)
# create the main window and profit object
 root = tk.Tk()
 pro = Profit(root)
 root.mainloop()

Gribouillis write Mar-31-2023, 09:04 PM:
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