array matching

[MRAB]

Bill Jordan wrote:
> Hey guys,
>  
> I am sorry if this is not the right list to post some questions. I have 
> a simple question please and would appreciate some answers as I am new 
> to Python.
>  
> I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]]
> I want to arrang this array in different arrays so each one will have 
> what is attached to. For example I want the output:
>  
> A =[1,3] and B=[2,4]
>  
Build a dict of lists, ie the key is the first member of the sublist and
the value is a list of second members of the sublist.