Attribute assignment using getattr and setattr in Python

The __getattr__ method intercepts attribute references and the __setattr__ intercepts all attribute assignments.

class Employee(object):
    def __init__(self, data):
        super().__setattr__('data', dict())
        self.data = data
 
    def __getattr__(self, name):
        if name in self.data:
            return self.data[name]
        else:
            return 0
 
    def __setattr__(self, key, value):
        if key in self.data:
            self.data[key] = value
        else:
            super().__setattr__(key, value)
 
 
emp = Employee({'age': 23, 'name': 'John'})
print(emp.age)
print(emp.name)
print(emp.data)
print(emp.salary)
 
emp.salary = 50000
print(emp.salary)

Sample output of above program.

23
John
{'age': 23, 'name': 'John'}
0
50000

Python Programming

Attribute assignment using __getattr__ and __setattr__ in Python

Sample output of above program.

Attribute assignment using getattr and setattr in Python