On Thu, 2006-07-27 at 20:44 +0000, John Salerno wrote: > My code is below. The main focus would be on the OnStart method. I want > to make sure that a positive integer is entered in the input box. At > first I tried an if/else clause, then switched to try/except. Neither is > perfect yet, but I was wondering which I should try for in the first > place. I figure I need to check for an emptry string, non-numeric > strings (maybe these are the same check), 0 and negative numbers (which > might also fall into the category of 'anything but a number' because of > the negative sign). >
Have a look at using a wx.Validator in your wx.TextCtrl. Syntax for wx.TextCtrl: wx.TextCtrl(parent, id, value="", pos=wx.DefaultPosition, size=wx.DefaultSize, style=0, validator=wx.DefaultValidator, name=wx.TextCtrlNameStr) This will enable you to automagically check the TextCtrl if it's empty, has wrong data type, does not meet a prescribed condition (eg: no negative numbers) and do something if it does not pass validation (eg: colour the background of the TextCtrl red, initiate a system beep, etc). Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list