asynchronous object initialisation

code.py

import asyncio


class AsyncInitMeta(type):
    @asyncio.coroutine
    def __call__(cls, *args, **kwargs):
        self = cls.__new__(cls)
        yield from self.__init__(*args, **kwargs)
        return self


class Person(metaclass=AsyncInitMeta):
    def __init__(self, f):
        name = yield from f
        self.name = name

    def __repr__(self):
        return 'Person(name={})'.format(self.name)

f = asyncio.Future()
f.set_result('nathan')

person = asyncio.get_event_loop().run_until_complete(Person(f))

print('hello', person.name)
print('person?', person)

output

hello nathan
person? Person(name=nathan)