Nested List Question

[Alex Martelli]

Newsfeeds <chris.mccoy at spirentcom.com> wrote:

> Hello All,
> 
>   Could anyone tell me why this code produces the output it does?
   ...
> gridSystemId = [[None]*columns]*rows

You've made gridSystemID a list of `rows` references to the SAME "inner"
list, so the behavior you observe is the only possible one.

If you want copies instead, ASK for copies...:

gridSystemId = [ [None]*columns for x in xrange(rows) ]


Alex