Each key is separated by a colon (:) from its value, items are separated by commas, and the whole thing is enclosed in a curved brace. An empty dictionary with no items is written with only two curly braces, such as: {}.
Keys are unique within a dictionary while values cannot be. The values of a dictionary can be of any type, but the key must be of an immutable data type such as strings, numbers, or tuples.
Access value in the dictionary to access dictionary elements, you can use square brackets familiar with the key to getting its value.
How to access data from the python dictionary
Note – There is no indexing because of unordered collections of data
print(user1['name'])
# you cannot do like this
which types of data python dictionaries can store?
user_info = {
'name' : 'pramod',
'age' : 22 ,
'rollno' :'17691a05b9',
'class' : 'B-Tech'}
type(usser_info)
print(user_info['name'])
print(user_info['age'])
print(user_info['rollno'])
print(user_info['class'])How to add data to an empty dictionary
user_info2 = {}
user_info2['name'] = 'prem kumar'
user_info2['age'] = 22
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