title: Will creating a tkinter button in a function, while using lambda as a command, function properly?
body: <p>I have been creating an application using Tkinter to instantiate the GUI. I am trying to make it object oriented so the code could be used elsewhere making Tkinter easier to use. The problem I've come across is being able to call complex functions with arguments for button commands.</p>
  
  <p>I've tried to learn as much as I can about buttons. I've read and watched videos on binding the command to specific mouse clicks and passing the function using partial to break down the function. These options would not fit the current architecture of the code. The last idea I tried was using lambda to create a temporary function.</p>
  
  <pre class="lang-py prettyprint-override"><code>def add_button(self, title, command, where, frame):
      button = ttk.Button(frame, text=title,command=lambda: command)
      button.pack(side=where, fill='both', expand=True)
      return button
  </code></pre>
  
  <p>This is a class that instantiates a page with the desired widgets.</p>
  
  <pre class="lang-py prettyprint-override"><code>class StartPage(Page):
  
      def __init__(self, container, controller):
          super().__init__(container, controller)
  
          title_frame = tk.LabelFrame(self, text='StartPage')
          title_frame.pack(side='top')
          title = tk.Label(title_frame, text='EPA Engine Report Filing', font=('Helvetica', 16))
          title.pack(side='bottom', pady=25)
  
          buttons = {'Quit': quit(), 'Stuff': do_something()}
  
          button_frame = tk.Frame(self)
          button_frame.pack(side='top', pady=75)
  
          for button, command in buttons.items():
              self.add_button(button, command, 'bottom', button_frame)
  </code></pre>
  
  <p>My specific question is this, when the for loop iterates through the dictionary declared as buttons in <code>StartPage.__init__</code>, do the lambda functions for the 'Stuff' button overwrite the lambda function for the previous 'quit' button? If this is the case the last button created would be the only button to work, if I understand lambda. When this code is run, nothing appears. When the functions for the buttons don't have parentheses the initial window appears but the buttons do nothing.</p>
  
  <p>Thanks for reading and any advice you can give is appreciated.</p>