Dictionaries - Python

Dictionaries:

^v       Dictionary is an unordered collection of elements. An element in dictionary has a key: value pair.

^v       All elements in dictionary are placed inside the curly braces i.e. { }

^v       Elements in Dictionaries are accessed via keys and not by their position.

^v       The values of a dictionary can be any data type.

^v       Keys must be immutable data type (numbers, strings, tuple)

Operations on dictionary:

1.              Accessing an element

2.              Update

3.              Add element

4.              Membership

Methods in dictionary: