Create a slightly modified copy of a Python tuple?

Question

I have a Python tuple, t, with 5 entries. t[2] is an int. How can I create another tuple with the same contents, but with t[2] incremented?

Is there a better way than:

t2 = (t[0], t[1], t[2] + 1, t[3], t[4]) ?

Answer 1

I would be inclined to use a namedtuple instead, and use the _replace method:

>>> from collections import namedtuple
>>> Test = namedtuple('Test', 'foo bar baz')
>>> t1 = Test(1, 2, 3)
>>> t1
Test(foo=1, bar=2, baz=3)
>>> t2 = t1._replace(bar=t1.bar+1)
>>> t2
Test(foo=1, bar=3, baz=3)

This also gives semantic meaning to the individual elements in the tuple, i.e. you refer to bar rather than just the 1th element.