In Python, the Dictionary data type is one of the most popular and useful data types. A dictionary stores the data in a mapping of key and value pair. Dictionaries are mainly a collection of objects; they are indexed by numbers, strings, or any other immutable objects. Keys should be unique in the dictionaries; however, the values in the dictionary can be changed. Python dictionaries are the only built-in mapping type; they can be thought of as a mapping from a set of keys to a set of values. They are created using the {key:value} syntax. For example, the following code can be used to create a dictionary that maps words to numerals using different methods:

>>>a= {'Monday':1,'Tuesday':2,'Wednesday':3} #creates a dictionary 
>>>b =dict({'Monday':1 , 'Tuesday': 2, 'Wednesday'...