[Python] A Journey to Python Async - 2. Generators as Iterators

Why Generators?

As previously announced, our journey starts from the discussion about Python generators. But why? To recapitulate, let’s write a very simple async function and see its execution result.

async def journey() -> None:
  return 1

ret = journey()
print(type(ret)) 

<class 'coroutine'>
sys:1: RuntimeWarning: coroutine 'journey' was never awaited

Please ignore the warning for a bit. If it were a simple synchronous function(i.e. just the normal Python function), it would …

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