[EMAIL PROTECTED] wrote: > I have a confusion when I do some practice, the code and output are as > following, > >>>> def fun(): > print 'In fun()....' > > >>>> testfun = fun() > In fun().... >>>> print testfun > None >>>> testfun2 = fun >>>> print testfun2 > <function fun at 0x00CC1270> >>>> print testfun2() > In fun().... > None > > what is 'testfun'? Why it is 'None'? And print testfun2(), what is the > meaning of 'None'? > > Thanks! > > When a function does not specifically return a value then its return value is a particular value known as None, the only instance of the None type.
So testfun is the result of calling the fun function, and it's None because fun() does not return a value. Since testfun2 is just another reference to the fun function, testfun2() is None for exactly the same reasons. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com
-- http://mail.python.org/mailman/listinfo/python-list