How to set class attribute with await in __init__

Question

How can I define a class with await in the constructor or class body?

For example what I want:

im         


        

Answer 1

Better yet you can do something like this, which is very easy:

import asyncio

class Foo:
    def __init__(self, settings):
        self.settings = settings

    async def async_init(self):
        await create_pool(dsn)

    def __await__(self):
        return self.async_init().__await__()

loop = asyncio.get_event_loop()
foo = loop.run_until_complete(Foo(settings))

Basically what happens here is __init__() gets called first as usual. Then __await__() gets called which then awaits async_init().