dic.py

person = {'name': 'Phill', 'age': 22}

print('Name: ', person.get('name'))

print('Age: ', person.get('age'))

# value is not provided
print('Salary: ', person.get('salary'))


# value is provided
print('Salary: ', person.get('salary', 0.0))

#Вывод

Salary:  None
Traceback (most recent call last):
  File "", line 7, in 
    print(person['salary'])
KeyError: 'salary'