Is it possible to create anonymous objects in Python?

I'm debugging some Python that takes, as input, a list of objects, each with some attributes.

I'd like to hard-code some test values -- let's say, a list of four objects whose "foo" attribute is set to some number.

Is there a more concise way than this?

x1.foo = 1
x2.foo = 2
x3.foo = 3
x4.foo = 4
myfunc([x1, x2, x3, x4])

Ideally, I'd just like to be able to say something like:

myfunc([<foo=1>, <foo=2>, <foo=3>, <foo=4>])

(Obviously, that is made-up syntax. But is there something similar that really works?)

Note: This will never be checked in. It's just some throwaway debug code. So don't worry about readability or maintainability.

I found this: http://www.hydrogen18.com/blog/python-anonymous-objects.html, and in my limited testing it seems like it works:

>>> obj = type('',(object,),{"foo": 1})()
>>> obj.foo
1

I like Tetha's solution, but it's unnecessarily complex.

Here's something simpler:

>>> class MicroMock(object):
...     def __init__(self, **kwargs):
...         self.__dict__.update(kwargs)
...
>>> def print_foo(x):
...     print x.foo
...
>>> print_foo(MicroMock(foo=3))
3

So brief, such Python! O.o

>>> Object = lambda **kwargs: type("Object", (), kwargs)

Then you can use Object as a generic object constructor:

>>> person = Object(name = "Bernhard", gender = "male", age = 42)
>>> person.name
'Bernhard'
>>>

EDIT: Well okay, technically this creates a class object, not an object object. But you can treat it like an anonymous object or you modify the first line by appending a pair of parenthesis to create an instance immediately:

>>> Object = lambda **kwargs: type("Object", (), kwargs)()

Have a look at this:

class MiniMock(object):
    def __new__(cls, **attrs):
        result = object.__new__(cls)
        result.__dict__ = attrs
        return result

def print_foo(x):
    print x.foo

print_foo(MiniMock(foo=3))

Maybe you can use namedtuple to solve this as following:

from collections import namedtuple
Mock = namedtuple('Mock', ['foo'])

mock = Mock(foo=1)
mock.foo  // 1