On Wednesday, August 31, 2016 at 12:09:16 AM UTC-7, ast wrote: > Hello > > I made few experiments about variables visibility > for methods. > > class MyClass: > a = 1 > def test(self): > print(a) > > obj = MyClass() > obj.test() > > Traceback (most recent call last): > File "<pyshell#16>", line 1, in <module> > obj.test() > File "<pyshell#7>", line 4, in test > print(a) > NameError: name 'a' is not defined > > =========== RESTART: Shell ============== > > a = 1 > > class MyClass: > def test(self): > print(a) > > obj = MyClass() > obj.test() > 1 > > So it seems that when an object's méthod is executed, variables > in the scope outside the object's class can be read (2nd example), > but not variables inside the class (1st example). > > For 1st example, I know that print(MyClass.a) or print(self.a) > would have work. > > Any comments are welcome.
In your example a is an attribute of MyClass, not instances of MyClass like obj. Refrencing a as MyClass.a returns 1. See below: >>> class MyClass: ... a = 1 ... def test(self): ... print(MyClass.a) ... >>> obj = MyClass() >>> obj.test() 1 -- https://mail.python.org/mailman/listinfo/python-list
