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Tkinter can't append labels to lists?

原文 2013-03-02 12:56:51 7 1 python/ tkinter/ label/ configure

labels = []
global labels
#blablbalabla code
welcome = Tkinter.Label(root,text= "Welcome to Fobby").place(x=250,y=250)
labels.append(welcome)
print labels
>>> [None]

What is wrong? Are labels an incompatible class with lists?

1 answers

This is because place() returns None:

labels = []
welcome = Tkinter.Label(root,text= "Welcome to Fobby")
welcome.place(x=250,y=250)
labels.append(welcome)
print labels

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Related Question I can't seem to figure out how to update tkinter labels I can't append single elements to nested lists Why can't I append 2 lists then save as a varible then print in python? Image and labels won't appear in Tkinter Can't import tkinter (or Tkinter) Trying to convert app from Tkinter to Kivy: can't get labels to update Can't Change Labels for Dynamically-Added Form Fields Using wtforms, append_entry() and FieldList(FormField()) Can't create lists of lists Can't Append to the File Can't append to dictionary

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