in many cases,you can use mainloop() or widget.mainloop(),such as:
from Tkinter import *
widget = Button(text='Spam', padx=10, pady=10)
widget.pack(padx=20, pady=20)
widget.config(cursor='gumby')
widget.config(bd=8, relief=RAISED)
widget.config(bg='dark green', fg='white')
widget.config(font=('helvetica', 20, 'underline italic'))
widget.mainloop() # mainloop() is ok
i don't know why i can't use mainloop() instead of Demo().mainloop()??
from Tkinter import * # get base widget set
from dialogTable import demos # button callback handlers
from quitter import Quitter # attach a quit object to me
class Demo(Frame):
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.pack()
Label(self, text="Basic demos").pack()
for (key, value) in demos.items():
Button(self, text=key, command=value).pack(side=TOP, fill=BOTH)
Quitter(self).pack(side=TOP, fill=BOTH)
if __name__ == '__main__':
Demo().mainloop() # you can't use mainloop()_______________________________________________
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