"wesley chun" <[EMAIL PROTECTED]> wrote > when you use the 3rd element, it's called the extended slice syntax.
The ref manual describes use of the third value as simple slicing, for extended slicing it says this: ---------------------- The semantics for an extended slicing are as follows. The primary must evaluate to a mapping object, and it is indexed with a key that is constructed from the slice list, as follows. If the slice list contains at least one comma, the key is a tuple containing the conversion of the slice items; otherwise, the conversion of the lone slice item is the key. The conversion of a slice item that is an expression is that expression. The conversion of an ellipsis slice item is the built-in Ellipsis object. The conversion of a proper slice is a slice object (see section 3.2) whose start, stop and step attributes are the values of the expressions given as lower bound, upper bound and stride, respectively, substituting None for missing expressions. ----------------------- I've read it three times now and stioll have no idea what its on about! Some ex[erimentation needed I think, but no time now. :-) -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld _______________________________________________ Tutor maillist - [email protected] http://mail.python.org/mailman/listinfo/tutor
