使用Python GUI創建按鈕

我想用類在Python中創建按鈕，但運行時按鈕不會出現。下面是我的代碼使用Python GUI創建按鈕

#Button_2 
#Using Classes 

from Tkinter import * 

class Application(Frame): 
    """A GUI application with three button""" 

    def _init_(self, master): 
     """ Initialise the Frame. """ 
     Frame._init_(self, master) 
     self.grid() 
     self.create_widgets() 

    def create_widgets(self): 
     #"""Create three buttons""" 
     #Create first buttom 
     self.btn1 = Button(self, text = "I do nothing") 
     self.btn1.grid() 

     #Create second button 
     self.btn2 = Button(self) 
     self.btn2.grid() 
     self.btn2.configure(text = "T do nothing as well") 

     #Create third button 
     self.btn3 = Button(self) 
     self.btn3.grid()  
     self.btn3.configure(text = "I do nothing as well as well") 

    root = Tk() 
    root.title("Lazy Button 2") 
    root.geometry("500x500") 
    app = Application(root) 

    root.mainloop()

任何幫助，將不勝感激

來源

2012-10-25 user1581917

添加到mgilson的答案，你的縮進是不存在的。 – John

我縮進了你的代碼，以便它在SO上正確渲染。渲染問題的一部分是看起來你有選項卡和空格。（我將它們全部轉換爲PEP8中指定的每個級別的4個空格）。希望這只是在SO上發佈代碼，但如果沒有，**請不要混合代碼中的製表符和空格**，並且最好像上面所做的那樣對每個縮進級別使用4個空格。 – mgilson

OK，第一個問題是您聲明瞭下面的代碼：

root = Tk() 
root.title("Lazy Button 2") 
root.geometry("500x500") 
app = Application(root) 

root.mainloop()code here

類本身裏面。它應該在外面，所以這是一個縮進問題（可能是與縮進相關的stackoverflow問題？）。

其次我簡化了代碼，使之運行

from Tkinter import * 

class Application(Frame): 
     """A GUI application with three button""" 

    #create a class variable from the root (master):called by the constructor 
    def _init_(self, master): 
      self.master = master 

    #simple button construction 
    # create a button with chosen arguments 
    # pack it after the creation not in the middle or before 

    def create_widgets(self): 
      #"""Create three buttons""" 
      #Create first button 
      btn1 = Button(self.master, text = "I do nothing") 
      btn1.pack() 

      #Create second button 
      btn2 = Button(self.master, text = "T do nothing as well") 
      btn2.pack() 

     #Create third button 
     btn3=Button(self.master, text = "I do nothing as well as well") 
     btn3.pack() 

    #must be outside class definition but probably due to stackoverlow 
    root = Tk() 
    root.title("Lazy Button 2") 
    root.geometry("500x500") 
    app = Application(root) 
    #call the method 
    app.create_widgets() 
    root.mainloop()

這是一個起點，肯定能行如下證明：

enter image description here

您可以與周圍的電網probablty渣土（）而不是包，並調用def init構造函數中的方法。希望能幫助到你。

該調用方法也適用：

root = Tk() 
root.title("Lazy Button 2") 
root.geometry("500x500") 
app = Application(root).create_widgets() #creates and invokes 
root.mainloop()

我最後的嘗試也可以工作：通過

def __init__(self,master): 
    self.master = master 
    self.create_widgets()

如下：

root = Tk() 
root.title("Lazy Button 2") 
root.geometry("500x500") 
app = Application(root) 
root.mainloop()

enter image description here

國際泳聯L碼：

from Tkinter import * 

class Application(Frame): 
"""A GUI application with three button""" 

def __init__(self,master): 
    self.master = master 
    self.create_widgets() 



def create_widgets(self): 
    #"""Create three buttons""" 
    #Create first buttom 
    btn1 = Button(self.master, text = "I do nothing") 
    btn1.pack() 

    #Create second button 
    btn2 = Button(self.master, text = "T do nothing as well") 
    btn2.pack() 

    #Create third button 
    btn3=Button(self.master, text = "I do nothing as well as well") 
    btn3.pack() 

root = Tk() 
root.title("Lazy Button 2") 
root.geometry("500x500") 
app = Application(root) 
root.mainloop()

enter image description here

來源

2012-10-25 14:55:55

你需要你的「構造」的方法被命名爲__init__，不_init_。正如它所寫，您的grid和create_widgets方法永遠不會被調用，因爲_init_永遠不會被調用。

來源

2012-10-25 13:49:21 mgilson

使用Python GUI創建按鈕

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