Ч.Н.Г. на всички потребители на Калдата!

Няма съобщение за никаква грешка от страна на PyCharm, напротив съобщава, че exit code = 0

За жалост визуализира само празен прозорец без контролите (widgets) в него. Би следвало да се появят 2 widgets за въвеждане, 3 widgets за текст и 1 widget за бутон.

Начинаещ съм с Python и с PyCharm.

Ето и въпросния код:

import tkinter as tk
class Application(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.pack()

# create the application
app = Application()
app.master.title("Sumator")
app.master.minsize(width=640, height=96)

# start the program
app.mainloop()

def __init__(self, master=None):
    super().__init__(master)
    self.pack()
    self.create_widgets()

    def create_widgets(self):
        # create widgets
        self.firstNumberEntry = tk.Entry()
        self.plusSign = tk.Label(text="+")
        self.secondNumberEntry = tk.Entry()
        self.equalSign = tk.Label(text="=")
        self.resultLabel = tk.Label(text="Result...", bg="green", fg="white")
        self.calculateButton = tk.Button(text="Calculate")
        # place widgets
        self.firstNumberEntry.pack(side="left")
        self.plusSign.pack(side="left")
        self.secondNumberEntry.pack(side="left")
        self.resultLabel.pack(side="left")
        self.calculateButton.pack(side="left")

        tk.Button(text="Calculate", command=self.calculate)
        def calculate(self):
            first_value = float(self.firstNumberEntry.get())
            second_value = float(self.secondNumberEntry.get())
            result = first_value + second_value
            self.resultLabel.config(text=str(result), bg="green", fg="white")

 

Честита Нова Година и от мене.

Поправих програмата по този начин:

import tkinter as tk
from tkinter import *

class Application(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.firstNumber = DoubleVar()
        self.secondNumber = DoubleVar()
        self.resultNumber = StringVar()
        self.resultNumber.set("Result...")
        self.pack()
        # self.create_widgets()

    def create_widgets(self):
        # create widgets
        self.firstNumberEntry = tk.Entry(textvariable = self.firstNumber)
        self.plusSign = tk.Label(text="+")
        self.secondNumberEntry = tk.Entry(textvariable = self.secondNumber)
        self.equalSign = tk.Label(text="=")
        self.resultLabel = tk.Label(bg="green", fg="white", width=12, textvariable = self.resultNumber)
        self.calculateButton = tk.Button(text="Calculate", command = self.calculate)
       
        # place widgets
        self.firstNumberEntry.pack(side="left")
        self.plusSign.pack(side="left")
        self.secondNumberEntry.pack(side="left")
        self.equalSign.pack(side="left")
        self.resultLabel.pack(side="left")
        self.calculateButton.pack(side="left")

    def calculate(self):
        first_value = float(self.firstNumber.get())
        second_value = float(self.secondNumber.get())
        result = first_value + second_value
        self.resultNumber.set(str(result))

# create the application
app = Application()
app.master.title("Sumator")
app.master.minsize(width=640, height=96)
app.create_widgets()

# start the program
app.mainloop()

        
 

 

Благодаря!

Разбрах защо така ще работи ....