from tkinter import *

class WindowFunctions:
    def __init__(self, root):
        self.root = root
        self.dice = Die()
        self.data = Entry(self.root)
        self.entry_side = Entry(self.root)
        self.entry_side.pack()
        self.entry_throw = Entry(self.root)
        self.entry_throw.pack()
        self.entry_dice = Entry(self.root)
        self.entry_dice.pack()
        self.button_generate = Button(self.root, text='Generuj rzut', command=self.taking)
        self.button_generate.pack()

    def taking(self):
        value_sides = self.entry_side.get()  # Tutaj jest problem
        value_throw = 1000
        value_dies = 2
        print(value_sides)

        self.dice.generate_sides(value_sides)
        result = self.dice.generate_results(value_throw, value_dies)
        frequencies = self.dice.generate_frequencies(result)

if __name__ == '__main__':
    root = Tk()
    root.bind('<Escape>', quit)
    funkcja = WindowFunctions(root)
    root.mainloop()