Thank you Fredrik. It makes total sense now that you've explained it this way. I frustrated at my ignorance on the assignment issue :)
Fredrik Lundh wrote: > [EMAIL PROTECTED] wrote: > > > I've created a short test program that uses tkFileDialog.askdirectory > > to help the user input a path into a tk entry widget. The problem I'm > > having is that when I run the code as listed below, the getPath > > function is called when the program initially runs, not when the button > > is pressed. > > the right side of an assignment is always evaluated before it is assigned, so > > self.button["command"] = self.getPath(t) > > will call self.getPath(t) and then assign the return value to > button["command"]. > quite obvious, if you think about it, right ? > > the easiest way to fix this is to add a local function that calls getPath, and > use that as the button callback: > > def callback(): > self.getPath(t) > self.button["command"] = callback > > (if you want, you can inline the getPath code in the callback). > > </F> -- http://mail.python.org/mailman/listinfo/python-list
