Python Tkinter； .place() 不工作，但 .grid() 和 .pack() 做

Question

I am trying to insert a Label with text on a frame. However, it does not appear with .place, even though it works fine with .grid and .pack.

label = tk.Label(master, text="test")
label.pack() # works

label = tk.Label(master, text="test")
label.grid() # works

label = tk.Label(master, text="test")
label.place(relx=.5, rely=.5) # doesn't work

label = tk.Label(master, text="test")
label.place(relx=.5, rely=.5, width=500, height=500) # doesn't work

To be clear, I am not mixing the 3 methods. I'm running each attempt by separately.

My code structure is as follows:

class Window(tk.Tk)
   def __init__(self):
      tk.Tk.__init__(self)
      frame_init = Frame_0(self, 0)
      frame_init.pack()

class Frame(tk.Frame)
   def __init__(self, Window)
      tk.Frame.__init__(self, Window)

class Frame_0(Frame):
   def __init__(self, Window)
      super().__init__(Window)
      label = tk.Label(self, text="test")
      label.METHOD()   # METHOD is pack, grid, or place ()

... somewhere else

Window = Window()
Window.mainloop()

Answer 1

When you use place , the size of the child won't affect the size of the master. Since you didn't specify a size for your frame its size will be 1x1. Your label is in the frame, but the frame is virtually invisible.

If you're going to use place , it's up to you to make sure that you are placing the widget inside a visible widget.

Answer 2

Try anchoring method, it may be hiding inside

label.place(anchor = CENTER)

Maximize you window and check whether it's hiding somewhere too