"""
Author:Nguyễn Mạnh Trung
Date: 11/10/2021
Problem:Assume that the variable data refers to the dictionary {'b':20, 'a':35}. Write the
    values of the following expressions:
    a. data['a']
    b. data.get('c', None)
    c. len(data)
    d. data.keys()
    e. data.values()
    f. data.pop('b')
    g. data # After the pop above
Solution:
    ....
"""
data = {'b': 20, 'a': 35}
print(data['a'])
print(data.get('c', None))
print(len(data))
print(data.keys())
print(data.values())
print(data.pop('b'))
print(data)