Data Structures in Python- Dictionaries

 Ref Video : https://www.youtube.com/watch?v=rpsYzPv1HiQ

Dictionaries

• A Python dictionary is a data structure that stores data in key-value pairs, where each key is unique and is used to retrieve its associated value. 
• It is mainly used when you want to store and access data by a name (key) instead of by position like in a list.

Ordered---Yes, it is ordered

Allow Duplicates---Keys are unique and Values allow duplicates

Indexed---Not indexed. You can access values by using their keys, not indexes.

Mutable---Yes, values can be updated in Dictionary

Methods in Dictionaries

get() ---Returns value safely, gives none if missing.

keys()---Returns all the keys in your dictionary

Values()---Returns all the values in your dictionary

items()--- Returns all (Key, value) pair of your dictionary

update()---adds new keys and updates existing ones using another dictionary

pop()--- Removes a key form the dictionary and returns its value

popitem()---retuns and deletes the most recent key value pair from the dictionary

fromkey()--builds a new dictionary where all keys get the same default value