index in "double" list

[Guest]

Hello!

I have a list of lists (e.g. [[1,"a"],[2,"b"],[3,"c"]]) and
would like to do index on the first element of the lists.
Can it be done?

B.

 

[Larry Bates]

If you have list:

t=[[1,"a"],[2,"b"],[3,"c"]]

The first element of each list contained
in t is accessed by:

t[n][0]

where n is the element number you wish to access
(zero based of course).

-Larry

 

[Dan Bishop]

Hello!

I have a list of lists (e.g. [[1,"a"],[2,"b"],[3,"c"]]) and
would like to do index on the first element of the lists.
Can it be done?

I think you might want to try using dicts.

d = {1: 'a', 2: 'b', 3: 'c'}
d[2]

'b'

If you already have a list of lists, you can convert it to a dict with
the constructor.

a = [[1, "a"], [2, "b"], [3, "c"]]
d = dict(a)