An immutable Container.
We can define a tuple with parentheses, in fact, we can also without any brackets, because any thing separated by commas is evaluated as a tuple.
tuple([1, 2, 3]) # (1, 2, 3)It also can be add, subtract, multiply, can use in.
Since tuples are immutable, it is possible to use them as keys in a dictionary.
An immutable sequence may still change if it contains a mutable value as its element.