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# Explicit
query = self.session.query(Book)
book = yield from query.get(1)

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# Implicit
query = self.session.query(Book)
book = query.get(1) # implicit switch here

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# Explicit
result = yield from self.make_rpc_call()

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# Implicit
result = self.make_rpc_call()  # implicit switch here

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@asyncio.coroutine
def slow_method():
 yield from perform_a_blocking_call()
 return 'Done'
 
loop = asyncio.get_event_loop()
loop.run_until_complete(slow_method())
loop.close()

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import pytest


def track_test_fails():
    @pytest.mark.tryfirst
    def pytest_runtest_makereport(item, call, __multicall__):
        # execute all other hooks to obtain the report object
        rep = __multicall__.execute()
        # `when` is setup, call, teardown
        setattr(item, "rep_" + rep.when, rep)

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# rpc_factory is what used to be rpc

@entrypoint
def rpc_factory(expected_exceptions=None):
    return DependencyFactory(NovaRpcProvider, expected_exceptions)


def rpc(service_fn=None, expected_exceptions=None):
    if service_fn is None:
        return partial(rpc, expected_exceptions=expected_exceptions)

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# re: nameko entrypoints

def wrapt_entrypoint(entrypoint_fn=None, provider=None):
    """ Transform a callable into a decorator that can be used to declare
    entrypoints.

    The callable should indicate a EntrypointProvider class. Usages of the
    callable will have their kwargs combined with the provider to produce a
    DependencyFactory for the given wrapped service function.

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NB: Originally courtesy of http://blog.taggesell.de/index.php?/archives/73-Managing-Amazon-EC2-SSH-login-and-protecting-your-instances.html

Managing Amazon EC2 - SSH login and protecting your instances

How to log into your freshly fired-up instances and how to secure ssh access
(works under Linux and Mac OS, under Windows with Cygwin)

First time you want to log into a newly started instance you appear to have the chicken-and-egg problem: how to log in when you do not know the root password? Luckily Amazon devised a comfortable way to circumvent this: your Key Pairs. these are not to be confused with the „Access Key IDs“ on the Access Identifier web page and they are neither the X509 certificates. These Key pairs are automatically generated the first time you log into the web console and you can only download its private part. Store it in your ~/.ssh directory. In case you missed the download or don't know where you've put it AND you don't have any instances running, just generate and download a new one. 

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Django>=1.2
South
psycopg2