Can get reference of a part of a list?

[Terry Reedy]

"flyaflya" <flyaflya at gmail.com> wrote in message 
news:d6020b$3a7$1 at news.yaako.com...
>I want make a 2-D array from a list,all elements is references of
> list's,like this:
> a = [1,2,3,4]
> b = [ [1,2], [3,4] ]
> when change any elements of a, the elements of b will change too, so I
> can  use some function for list to change b.
> c/c++ can work in this way,I think let b[0] = a[0:2], b[1] = a[2:3],but
>    it's not reference,it's copy.

Look into Numerical Python or Numarray, where slices are views instead of 
copies.

TJR