Python tuples

In Python, we have a special kind of data structure called a tuple which functions like a list, except that its items cannot change once we have defined them:

my_tuple = ('a', 2, 'd', False)

Accessing tuple items

Similar to a string, we can access the elements of a tuple and information about the tuple itself, but we cannot alter a tuple's items (via the familiar square bracket index notation):

my_tuple = ("a", 2, "d", False, "d")

print(my_tuple[1])
# 2

print(len(my_tuple))
# 5

print(my_tuple.index("d"))
# 2 (the first instance)

my_tuple[5] = "e"
# TypeError: 'tuple' object does not support item assignment

my_tuple[2] = "e"
# TypeError: 'tuple' object does not support item assignment

We can thus think of a tuple as a list that behaves like a string!