Python Property vs Attribute
Class Attribute: Class Attributes are unique to each class. Each instance of the class will have this attribute. In the given example, the count variable is a class attribute.
Python3
# declare a classclass Employee: # class attribute count = 0 # define a method def increase(self): Employee.count += 1# create an Employee# class objecta1 = Employee()# calling object's methoda1.increase()# print value of class attributeprint(a1.count)a2 = Employee()a2.increase()print(a2.count)print(Employee.count) |
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Python property(): Returns object of the property class. In this example, we are demonstrating the use of property() function.
Python3
# create a classclass gfg: # constructor def __init__(self, value): self._value = value # getting the values def getter(self): print('Getting value') return self._value # setting the values def setter(self, value): print('Setting value to ' + value) self._value = value # deleting the values def deleter(self): print('Deleting value') del self._value # create a properties value = property(getter, setter, deleter, ) # create a gfg class objectx = gfg('Happy Coding!')print(x.value) x.value = 'Hey Coder!' # deleting the valuedel x.value |
Getting value Happy Coding! Setting value to Hey Coder! Deleting value
Applications
By using property() method, we can modify our class and implement the value constraint without any change required to the client code. So that the implementation is backward compatible.
Python property() function
Python property() function returns the object of the property class and it is used to create the property of a class. In Python, the property() function is a built-in function that allows us to create a property for a class. In this article, we will learn more about the Python property() function.