Python property()

The syntax of property() is:

property(fget=None, fset=None, fdel=None, doc=None)

property() Parameters

The property() takes multiple optional parameters:

• fget (optional) - To get the attribute value. Defaults are None.
• fset (optional) - For setting up the attribute value. Defaults are None.
• fdel (optional) - For deleting the attribute’s value.Defaults are None.
• doc (optional) - A string representation that contains the documentation for the attribute. For example a docstring )

Example 1: How to use property() function in python?

# Python program to explain property() function

# Alphabet class
class Alphabet:
	def __init__(self, value):
		self._value = value
		
	# getting the values
	def getValue(self):
		print('Getting value')
		return self._value
		
	# setting the values
	def setValue(self, value):
		print('Setting value to ' + value)
		self._value = value
		
	# deleting the values
	def delValue(self):
		print('Deleting value')
		del self._value
	
	value = property(getValue, setValue, delValue, )

# passing the value
x = Alphabet('PythonScholar')
print(x.value)

x.value = 'Python'

del x.value

Output:

Getting value
PythonScholar
Setting value to Python
Deleting value

Rules of property()

• If no arguments are given, property() returns a base property attribute that doesn’t contain any getter, setter or deleter.
• If doc isn’t provided, property() takes the docstring of the getter function.