Python-GUI-Programm, zwei Konvertierungen

Question

Ich arbeitete an dem Entwerfen eines Programms mit 2 Fenstern für die Konvertierung. Einer für Kilometer bis Meilen und der andere Kilometer bis Kilometer. Das GUI-Meldungsfeld hat zwei Stellen zum Tippen, aber nur die Kilomiles-Box gibt mir Ergebnisse. Ich habe verschiedene Dinge ausprobiert, aber ich habe nicht herausfinden kann, wie es zu bekommen, damit die Schaltfläche zu konvertieren für egal arbeitet, die ich Feld eingeben in.

import tkinter 
import tkinter.messagebox 


class MyGUI: 
    def __init__(self): 

    # Create the main window widget. 
    self.main_window = tkinter.Tk() 

    # Create two frames 
    self.top_frame = tkinter.Frame(self.main_window) 
    self.bottom_frame = tkinter.Frame(self.main_window) 

    # Create three Label widgets for the 
    # top frame. 
    self.label1 = tkinter.Label(self.top_frame, \ 
           text='Lets Have Fun') 
    self.label2 = tkinter.Label(self.top_frame, \ 
           text='Calculate Distance') 
    self.prompt_label = tkinter.Label(self.top_frame, \ 
       text='Enter how many kilometers you drove today:') 
    self.kilo_entry = tkinter.Entry(self.top_frame, \ 
            width=10) 
    self.prompt_label2 = tkinter.Label(self.top_frame, \ 
       text='Enter how many miles you drove today:') 
    self.miles_entry = tkinter.Entry(self.top_frame, \ 
            width=10) 
    # Pack the labels that are in the top frame. 
    # Use the side='top', 'left' and 'bottom' arguments to stack them 
    # one on top of the other. 

    self.label1.pack(side='top') 
    self.label2.pack(side='top') 
    self.prompt_label.pack(side='left') 
    self.kilo_entry.pack(side='left') 
    self.prompt_label2.pack(side='left') 
    self.miles_entry.pack(side='left') 


    self.top_frame.pack() 
    self.bottom_frame.pack() 


    self.my_button = tkinter.Button(self.main_window, \ 
            text='What if I dont know?', \ 
            command=self.do_something) 
    self.calc_button = tkinter.Button(self.top_frame, \ 
            text='Convert', \ 
            command=self.convert) 
    self.quit_button = tkinter.Button(self.main_window, \ 
             text='Quit', \ 
             command=self.main_window.destroy) 

    self.my_button.pack() 
    self.quit_button.pack() 
    self.calc_button.pack() 

    tkinter.mainloop() 

def do_something(self): 
    tkinter.messagebox.showinfo('Response', \ 
           'Just enter your favorite number.') 

miles = 0.00 
miles == " " 




def convert(self): 
    # Get the value entered by the user into the 
    # kilo_entry widget. 
    kilo = float(self.kilo_entry.get()) 

    # Convert kilometers to miles. 
    miles = kilo * 0.6214 

    # Display the results in an info dialog box. 
    tkinter.messagebox.showinfo('Results', \ 
     str(kilo) + ' kilometers is equal to ' + \ 
     str(miles) + ' miles.') 
    def convert2(self): 
    if self.kilo_entry == " ": 
     convert2(self) 
    else: 
     convert(self) 


    tkinter.mainloop() 


    # Get the value entered by the user into the 
    # kilo_entry widget. 
    miles = float(self.miles_entry.get()) 

    # Convert kilometers to miles. 
    kilo = (miles)/(0.6214) 

    # Display the results in an info dialog box. 
    tkinter.messagebox.showinfo('Results', \ 
     str(miles) + ' miles is equal to ' + \ 
     str(kilo) + ' kilo.') 

my_gui = MyGUI() 

Vielen Dank!

Answer 1

Ihr Code nach def do_something(self) ist ein bisschen ungeschickt. Insbesondere sollten Sie nicht mehr als einmal mainloop() aufrufen.

Eine Möglichkeit, Ihre convert() Methode zu implementieren wäre die Eingabefelder nur zu prüfen, ob leer sind, und dessen Inhalt umwandeln, wenn sie, wie unten nicht, sind:

class MyGUI: 
    def __init__(self): 
     # Create the main window 
     self.main_window = tkinter.Tk() 

     # Define all widgets 
     ... 

     # Launch the app 
     self.main_window.mainloop() 

    def do_something(self): 
     tkinter.messagebox.showinfo('Response', \ 
            'Just enter your favorite number.')  

    def convert(self): 
     # Convert each box if not empty 
     if self.kilo_entry.get() != "": 
      self.convert_kilo2miles() 
     if self.miles_entry.get() != "": 
      self.convert_miles2kilo() 

    def convert_kilo2miles(self): 
     # Get the value entered by the user into the kilo_entry widget. 
     kilo = float(self.kilo_entry.get()) 

     # Convert kilometers to miles. 
     miles = kilo * 0.6214 

     # Display the results in an info dialog box. 
     tkinter.messagebox.showinfo('Results', \ 
      str(kilo) + ' kilometers is equal to ' + \ 
      "{:.3f}".format(miles) + ' miles.') 

    def convert_miles2kilo(self): 
     # Get the value entered by the user into the miles_entry widget. 
     miles = float(self.miles_entry.get()) 

     # Convert miles to km. 
     kilo = (miles)/(0.6214) 

     # Display the results in an info dialog box. 
     tkinter.messagebox.showinfo('Results', \ 
      str(miles) + ' miles is equal to ' + \ 
      "{:.3f}".format(kilo) + ' kilometers.')