How to extend a tuple of tuples?

[Ben Finney]

"Frank Millman" <frank at chagford.com> writes:

> Assume you have a tuple of tuples -
>
> a = ((1, 2), (3, 4))
>
> You want to add a new tuple to it, so that it becomes

As you acknowledge, the tuple ‘a’ can't become anything else. Instead,
you need to create a different value.

> The obvious way does not work -
>
> a += (5, 6)
>
>    ((1, 2), (3, 4), 5, 6)

Right, because a tuple is immutable.

So instead, you want a different tuple. You do that by creating it,
explicitly constructing a new sequence with the items you want::

    b = tuple([
            item for item in a
            ] + [(5, 6)])

-- 
 \        “Look at it this way: Think of how stupid the average person |
  `\         is, and then realise half of 'em are stupider than that.” |
_o__)                           —George Carlin, _Doin' It Again_, 1990 |
Ben Finney