How can I access each element of a pair in a pair list?

Question

I have a list called pairs.

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

And I can access elements as:

for x in pairs:     print x 

which gives output like:

('a', 1) ('b', 2) ('c', 3) 

But I want to access each element in each pair, like in c++, if we use pair<string, int> we are able to access, first element and second element by x.first, and x.second.eg.

x = make_pair("a",1) x.first= 'a' x.second= 1 

How can I do the same in python?

Answer 1

Use tuple unpacking:

>>> pairs = [("a", 1), ("b", 2), ("c", 3)] >>> for a, b in pairs: ...    print a, b ...  a 1 b 2 c 3 

See also: Tuple unpacking in for loops.