What does it mean if a Python object is “subscriptable” or not?

In Python, the subscripting is nothing but indexing since it is the same as a mathematical notation that uses actual subscripts. In Python, for example, we use array[0] to get the first element of the array and the mathematicians use a0 for the same thing. In simple words, objects which can be subscripted are called sub scriptable objects. In Python, strings, lists, tuples, and dictionaries fall in subscriptable category.If we use array[0], python implements array.__getitem__(0) to subscript the array.

Note : subscriptable object is any object that implements the __getitem__ special method (think lists, dictionaries), used in a program, alone or with others, to specify one of the elements of an array."