> I want to verify that three parameters can all be converted into > integers, but I don't want to modify the parameters themselves.
You can twist and tweak this version OR completely redo it. In this version a list of the conversions are returned *but* if you want to only check if such a conversion can be made, you can return a bool result instead of the list. Also integers are converted to floats. just wrap the float() in an int() if you only want ints instead and wrap again with round() or mix and do as you please to get the results you want. def convertToInteger(*args): ''' try to convert arguments to integers and return them in a list''' try: return [float(x) for x in (args)] except ValueError: print 'convertToInteger: pass compatible args OR return a default!' return funcResult = convertToInteger('1', '2', '3') if funcResult: # if conversion was perfect, choose to do what you want # ... a, b, c = funcResult # change global variables! x, y, z = funcResult # create three new variables! print a, b, c print x, y, z # ... -- http://mail.python.org/mailman/listinfo/python-list