Tuple

Immutable, ordered series, traditionally containing different objects

Advantages: Immutable and ordered. Relatively efficient memory usage (more than lists).

Disadvantages: Searching is O(n). Hard to understand for many Python newcomers.

Creating

t = ('a', 1, [1,2,3])     # () and comma indicate tuple
t = ('a',)                # single-element tuple requires ,!

Convert from another type

tuple([1,2,3])            # (1,2,3)

Iterating over the elements

t = ('a', 'b', 'c')
for item in t:
    print(item)

Iterating over the sorted elements

t = ('d', 'a', 'c', 'b')
for item in sorted(t):
    print(item)