[Term Entry] Python Built-in Functions property() (Codecademy#2743)

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content/python/concepts/built-in-functions/terms/property/property.md

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+---
+Title: 'property()'
+Description: 'Declares a range of functions to manipulate class attributes.'
+Subjects:
+  - 'Code Foundations'
+  - 'Computer Science'
+Tags:
+  - 'Methods'
+  - 'Classes'
+  - 'Functions'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+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](https://www.codecademy.com/resources/docs/python/decorators) or assigned to a class attribute.
+
+## Syntax
+
+```pseudo
+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:
+
+```py
+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:
+
+```shell
+Bruno
+Mars
+```
+
+## Codebyte Example
+
+In this example the `property()` function is used to access the `radius` attribute of the `Circle` class.
+
+```codebyte/python
+class Flower:
+    def __init__(self, color):
+        self._color = color
+
+    def get_color(self):
+        return self._color
+
+    def set_color(self, color):
+        self._color = color
+
+    def del_color(self):
+        del self._color
+
+    color = property(get_color, set_color, del_color)
+
+# Create an instance of Flower
+flower = Flower("Blue")
+
+# Access the color attribute using the property
+print(flower.color)
+
+# Set a new value for the color attribute
+flower.color = "Red"
+
+# Access the updated color attribute
+print(flower.color)
+
+# Delete the radius attribute
+del flower.color
+```