Pythonでこのエラーが発生する理由tkinter：KeyError：<class '__main __。AAA_Page'>？

Question

私は比較的新しいtkinterです。私のプロジェクトは、tkinterのGUIを利用して、三角形の状況下ですべての辺と角度を解決する三角ソルバーを作ることです。ここに私のコードは次のとおりです。私は自分のコード上で見てきました

Traceback (most recent call last): 
File "C:\Users\bamak\AppData\Local\Programs\Python\Python36-32\lib\tkinter\__init__.py", line 1699, in __call__ 
    return self.func(*args) 
File "C:\Users\bamak\Desktop\CodingProjects\Triangle Solver--Create PT.py", line 49, in <lambda> 
    command = lambda: controller.show_frame(AAA_Page)) 
File "C:\Users\bamak\Desktop\CodingProjects\Triangle Solver--Create PT.py", line 37, in show_frame 
    frame = self.frames[cont] 
KeyError:(<)class '__main__.AAA_Page'(>) 

：

import tkinter as tk 
LARGE_FONT = ("Verdana", 14) 
SMALL_FONT = ("Verdana", 8) 
class CreatePT(tk.Tk): 
def __init__(self, *args, **kwargs): 
    tk.Tk.__init__(self, *args, *kwargs) 
    container = tk.Frame(self) 

    container.pack(side="top",fill="both", expand = True) 

    container.grid_rowconfigure(0,weight=1) 
    container.grid_columnconfigure(0,weight=1) 

    self.frames = {} 
    #This for loop allows the program to access the necessary page 
    for F in (WelcomePage, AAA_Page): 
     frame = F(container,self) 

     self.frames[F] = frame 

     frame.grid(row=0, column = 0, sticky = "nsew") 

    self.show_frame(WelcomePage) 

def show_frame(self,cont): 
    frame = self.frames[cont] 
    frame.tkraise() 

class WelcomePage(tk.Frame): 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "Welcome to the Triangle Solver",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    AAA_button = tk.Button(self, text = "AAA(Angle-Angle-Angle", 
     command = lambda: controller.show_frame(AAA_Page)) 
    AAA_button.pack() 

    AAS_button = tk.Button(self, text = "AAS(Angle-Angle-Side)", 
     command = lambda: controller.show_frame(AAS_Page)) 
    AAS_button.pack() 

    ASA_button = tk.Button(self, text = "ASA(Angle-Angle-Side)", 
     command = lambda: controller.show_frame(ASA_Page)) 
    ASA_button.pack() 

    SSA_button = tk.Button(self, text = "SSA(Side-Side-Angle)", 
     command = lambda: controller.show_frame(SSA_Page)) 
    SSA_button.pack() 

    SAS_button = tk.Button(self, text = "SAS(Side-Angle-Side)", 
     command = lambda: controller.show_frame(SAS_Page)) 
    SAS_button.pack() 

    SSS_button = tk.Button(self, text = "SSS(Side-Side-Side)", 
     command = lambda: controller.show_frame(SSS_Page)) 
    SSS_button.pack() 
class AAA_Page(tk.Frame): 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "AAA(Angle-Angle-Angle)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 
    warning_label = tk.Label(self, text = "Due to the given measurements, the program can only solve for the remaining angle", font = SMALL_FONT)#possible to make red? 
    warning_label.pack() 
    angle1_label = tk.Label(self, text = "Angle 1 =") 
    angle1_label.pack(side = right) 
    angle1_entry = tk.Entry(self, bd = 5) 
    angle1_entry.pack(side = left) 
class AAS_Page(tk.Frame):#NOTDONE 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "AAS(Angle-Angle-Side)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 
#Regular Page 

class ASA_Page(tk.Frame):#NOTDONE 
    #Intialization method 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "ASA(Angle-Side-Angle)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 
#Regular Page 

class SSA_Page(tk.Frame):#NOTDONE 
    #Intialization method 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "SSA(Side-Side-Angle)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 
#Regular Page 

class SAS_Page(tk.Frame):#NOTDONE 
    #Intialization method 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "AAA(Side-Angle-Side)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 
#Regular Page 

class SSS_Page(tk.Frame):#NOTDONE 
    #Intialization method 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "SSS(Side-Side-Side)",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

    button1 = tk.Button(self, text = "Back to Home", 
     command = lambda: controller.show_frame(WelcomePage)) 
    button1.pack() 

create = CreatePT() 
create.mainloop() 

GUIは罰金出てくるが、私はそれをテストするためにAAA_Pageフレームに切り替えてみてくださいたびに、私は次のエラーを取得しますしかし、私はどこに間違っているのか分かりません。どんな助けでも大変感謝します。ありがとう！

Answer 1

クラスのメソッド外にコードを入れないでください。これらのボタンはすべて、もう一度インデントする必要があります。

class WelcomePage(tk.Frame): 
    def __init__(self, parent, controller): 
     tk.Frame.__init__(self,parent) 
     label = tk.Label(self, text = "Welcome to the Triangle Solver",font=LARGE_FONT) 
     label.pack(pady = 10, padx = 10) 

     AAA_button = tk.Button(self, text = "AAA(Angle-Angle-Angle", 
      command = lambda: controller.show_frame(AAA_Page)) 
     AAA_button.pack()