property()

The property() function is a built-in Python function used to define methods that get, set, and delete class attributes. It can be used as a decorator or assigned to a class attribute.

Syntax

property(fget, fset, fdel, doc)

The property() function requires four parameters:

• fget: function to get the value of the attribute.
• fset: function to set the value of the attribute.
• fdel: function to delete the value of the attribute.
• doc: string that creates docstring for the attribute.

Note: If no arguments are given then the function returns a base property attribute without any getter, setter or deleter.

Example

The following example will demonstrate the use of property() function using the Pet class:

class Pet:
    def __init__(self, name):
        self._name = name

    def get_name(self):
        return self._name

    def set_name(self, name):
        self._name = name

    def del_name(self):
        del self._name

    name = property(get_name, set_name, del_name)

# Create an instance of Pet class
dog = Pet("Bruno")

# Access the name attribute using the property
print(dog.name)

# Set a new value for the name attribute
dog.name = "Mars"

# Access the updated name attribute
print(dog.name)

# Delete the name attribute
del dog.name

The code results in the following output:

Bruno
Mars

Codebyte Example

In this example the property() function is used to access the radius attribute of the Circle class.

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