Using Properties in Python classes cause "maximum recursion depth exceeded" [duplicate]

Question

Here is a test class that I wrote to became familiar with @properties and setter functionality in Python script:

class Test(object):     def __init__(self, value):         self.x =  value     @property     def x(self):         return self.x     @x.setter     def x(self, value):         self.x = value 

The problems is that when I want to create an object from my class, I face the following error:

>>> t = Test(1)  Traceback (most recent call last):   File "<pyshell#19>", line 1, in <module>     t = Test(1)   File "<pyshell#18>", line 3, in __init__     self.x =  value   File "<pyshell#18>", line 9, in x     self.x = value   File "<pyshell#18>", line 9, in x   #A bunch of lines skipped RuntimeError: maximum recursion depth exceeded >>>  

Answer 1

You are using the same name for the getter, setter and attribute. When setting up a property, you must rename the attribute locally; the convention is to prefix it with an underscore.

class Test(object):     def __init__(self, value):         self._x =  value      @property     def x(self):         return self._x