kj wrote:
Miles Kaufmann <mile...@umich.edu> writes:
...because the suite
namespace and the class namespace would get out of sync when different
objects were assigned to the class namespace:
class C:
x = 1
def foo(self):
print x
print self.x
o = C()
o.foo()
1
1
o.x = 2
o.foo()
1
2
But this unfortunate situation is already possible, because one
can already define
class C:
x = 1
def foo(self):
print C.x
print self.x
which would lead to exactly the same thing.
This is not the same thing, and definitely not exactly the same thing.
In your example you are explicitly stating whether you want the original
class variable, or the current, and possibly different, instance
variable. Further, the instance variable will not be different from the
class variable, even after C.x = whatever, unless the instance has had
that variable set specifically for it.
In [1]: class C(object):
...: x = 9
...: def doit(self):
...: print C.x
...: print self.x
...:
In [2]: test = C()
In [3]: test.doit()
9
9
In [4]: C.x = 10
In [5]: test.doit()
10
10
In [6]: test.x = 7
In [7]: test.doit()
10
7
~Ethan~
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