如何添加两个元组（或列表）的内容？

Question

I already had this problem multiple times, that I couldn't find a good solution to add the content of two tuples together. Something that does :

a = (1, 2)
b = (3, 4)
c = (a[0]+b[0], a[1]+b[1])

I think I saw a syntax to do just that once, but I can't remember how to do it.

Answer 1

This one also works:

>>> a = (1,2)
>>> b = (3,4)
>>> c = map(sum, zip(a,b))
>>> c
[4, 6]

It should work with any number of lists containing any number of numbers.

Answer 2

One liner:

map(lambda x, y: x+ y, a, b)

I believe this is the most efficient way. You can also import operator.add to avoid the lambda function. For me I rather prefer cleaner global namespace.

Answer 3

With generator comprehension:

a = (1, 2)
b = (3, 4)
result = [x + y for x, y in zip(a, b)]

[4, 6]