[EMAIL PROTECTED] wrote: > On Mar 30, 2:32 pm, Kevin Walzer <[EMAIL PROTECTED]> wrote: >> I'm having difficulty structuring a Tkinter menu entry. Here is the >> command in question: >> >> self.finkmenu.add_command(label='Update List of Packages', >> command=self.authorizeCommand(self.scanPackages)) >> >> When I start my program, it crashes because it's trying to run the >> command self.authorizeCommand. The reason I'm structuring it in this >> fashion is that this command takes another command as an argument--in >> this case, self.ScanPackages. >> >> The basic structure of the program is that the self.authorizeCommand >> function pops up a dialog box for a password; it then feeds the password >> to the function that it takes as an argument, i.e. self.scanPackages. >> >> I tried setting up the menu entry without the additional parameter, i.e. >> command=self.authorizeCommand, but then when I try to run the command >> from the menu, it complains there are not enough arguments. >> Unsurprising, since self.authorizeCommand takes another function name as >> an argument. >> >> How can I structure the menu item to reflect the correct number of >> arguments without it trying to execute the command? >> >> -- >> Kevin Walzer >> Code by Kevinhttp://www.codebykevin.com > > There are various ways to accomplish this. The 2 most popular that I > am aware of are using a helper function or lambda. > > using a lambda: > > command=(lambda:self.authorizeCommand(self.scanPackages)) > > > using a handler (i.e. indirection layer): > > def func(): > self.authorizeCommand(self.scanPackages) > > self.finkmenu.add_command(label='Update List of > Packages',command=func) > > > Both of these are talked about in detail in "Programming Python 3rd > Ed" by Lutz. I found that helpful for me. Of course, I decided to stop > using Tkinter and switched to wxPython. Hope this gets you going > though. > > Mike > lambda does the trick--thanks. I have the Lutz book but overlooked that part.
-- Kevin Walzer Code by Kevin http://www.codebykevin.com -- http://mail.python.org/mailman/listinfo/python-list
