Python descriptor

descriptor.py

# descriptor, is like a simplification on property
# one descriptor can be used in multiple classes, instead of repeated property definitions

class Name:
    def __get__(self, instance, owner):
        print(instance, 'get name')
        return instance._name
    def __set__(self, instance, value):
        print(instance, 'set name to', value)
        instance._name = value
    def __delete__(self, instance):
        del instance._name

class Technician:
    def __init__(self, name) -> None:
        self._name = name
    name = Name()

class Engineer:
    def __init__(self, name) -> None:
        self._name = name
    name = Name()


t = Technician('jj')
e = Technician('dd')

print(t.name)
print(e.name)

t.name = 'jack'
e.name = 'dela'

# output: #
#>> <__main__.Technician object at 0x0000000002935F60> get name
#>> jj
#>> <__main__.Technician object at 0x0000000002934320> get name
#>> dd
#>> <__main__.Technician object at 0x0000000002935F60> set name to jack
#>> <__main__.Technician object at 0x0000000002934320> set name to dela