What's wrong with the last three lines?
class FooClass(object):
pass
bar1 = object()
bar2 = object()
bar3 = object()
foo1 = FooClass()
foo2 = FooClass()
foo3 = FooClass()
object.__setattr__(foo1,'attribute','Hi')
foo2.__setattr__('attribute','Hi')
foo3.attribute = 'Hi'
object.__setattr__(bar1,'attribute','Hi')
bar2.attribute = 'Hi'
bar3.attribute = 'Hi'
I need an object having a single attribute (like foo) should I define a class (like FooClass) just for it?
object is built-in type, so you can't override attributes and methods of its instances.
Maybe you just want a dictionary or collections.NamedTuples:
>>> d = dict(foo=42)
{'foo': 42}
>>> d["foo"]
42
>>> from collections import namedtuple
>>> Point = namedtuple('Point', ['x', 'y'], verbose=True)
>>> p = Point(11, y=22) # instantiate with positional or keyword arguments
>>> p[0] + p[1] # indexable like the plain tuple (11, 22) 33
>>> x, y = p # unpack like a regular tuple
>>> x, y (11, 22)
>>> p.x + p.y # fields also accessible by name 33
>>> p # readable __repr__ with a name=value style Point(x=11, y=22)
You cannot add new attributes to an object(), only to subclasses.
Try collections.NamedTuples.
Besides, instead of object.__setattr__(foo1,'attribute','Hi'), setattr(foo1, 'attribute', 'Hi') would be better.
