Roy Smith roy at panix.com
Sat Sep 11 12:06:03 EDT 2004

• Previous message (by thread): little problem with list.reverse() function
• Next message (by thread): ANN: Python Graph Wiki
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

---

In article <LRE0d.236333$OR2.10714605 at news3.tin.it>,
 manuel <manuelbastioniNOSPAM at tin.it> wrote:

>  >>> a = [[1,2],[2,3],[4,5]]
>  >>> print a
> [[1, 2], [2, 3], [4, 5]]
>  >>> print a.reverse()
> None
>  >>>
> 
> 
> 
> ???
> Thanks...

The reverse() method of lists reverses the list in-place, and returns 
None on purpose.  Almost everybody finds this surprising when they 
discover it for the first time.  Many people (myself included) consider 
it a design flaw.  But, it is an intentional design decision, not a bug.

---

• Previous message (by thread): little problem with list.reverse() function
• Next message (by thread): ANN: Python Graph Wiki
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

---

More information about the Python-list mailing list