context manager 2 uses.

test_contextmanager.py

class Hello(object):
    def __init__(self, bla):
        print "CONSTRUCT WITH{}".format(bla)
        self.bla = bla

    def __enter__(self, *args, **kwargs):
        print "{{ENTER[{}]".format(self.bla)
        return "SOMETHING"
    def __exit__(self, *args, **kwargs):
        print "done[{}]}}".format(self.bla)


with Hello("yaddayadda") as x:
    print ">->",x


x2 = Hello('blablabla')
print ".."
with x2 as y:
    print ">>", x2, y



"""
CONSTRUCT WITHyaddayadda
{ENTER[yaddayadda]
>-> SOMETHING
done[yaddayadda]}
CONSTRUCT WITHblablabla
..
{ENTER[blablabla]
>> <__main__.Hello object at 0x104cc1fd0> SOMETHING
done[blablabla]}
"""

the as keyword just spits out the

__enter__

return value. (Optional)