修改列表元素

Question

How can I modify the list below:

[('AAA', '1-1', 1, (1.11, (2.22, 3.33))), ('BBB', '2-2', 2, (4.44, (5.55, 6.66))), ('CCC', '3-3', 3, (7, (8, 9)))]

into something like this:

[('AAA', '1-1', 1, 1.11, 2.22, 3.33), ('BBB', '2-2', 2, 4.44, 5.55, 6.66), ('CCC', '3-3', 3, 7, 8, 9)]

Many thanks in advance.

Answer 1

It looks like you want to flatten the tuples that are members of the outer list?

Try this:

>>> def flatten(lst):
    return sum( ([x] if not isinstance(x, (list, tuple)) else flatten(x)
             for x in lst), [] )

>>> def modify(lst):
    return [tuple(flatten(x)) for x in lst]

>>> x = [('AAA', '1-1', 1, (1.11, (2.22, 3.33))), ('BBB', '2-2', 2, (4.44, (5.55, 6.66))), ('CCC', '3-3', 3, (7, (8, 9)))]
>>> modify(x)
[('AAA', '1-1', 1, 1.11, 2.22, 3.33), ('BBB', '2-2', 2, 4.44, 5.55, 6.66), ('CCC', '3-3', 3, 7, 8, 9)]
>>> 

Hope it helps :-)

Answer 2

Not a specific solution, but there are a lot of great recipes in the itertools library:

http://docs.python.org/library/itertools.html