We may find @property in the front of some python functions. For example:
In this tutorial, we will introduce you how to use @property in python.
Python @property decorator
@property decorator is usually used in the front of some python class functions. It can make these functions can be used as class property.
For example:
class Rect:
def __init__(self, w, h):
self.w = w
self.h = h
@property
def width(self):
return self.w
@property
def height(self):
return self.h
In this example, width() and height() functions are decorated by @property. We can use them as a variable.
For example:
r = Rect(10, 5) print(r.width, r.height)
Run this code, we will get:
10 5
How about @property function does not return anything?
Look at this example:
@property
def width(self):
self.w = 100
Run this code, we will get:
None 5
It means @property function will return None defaultly.
How about calling @property function as a normal function?
For example:
print(r.height())
Run this code, we will find this error: TypeError: ‘int’ object is not callable
It means we can not use a @property function like a normal function.