async def main():

# Nothing happens if we just call "nested()".

# (a coroutine object is created but not awaited)

# A coroutine object is created but not awaited,

# so it *won't run at all*.

nested()

# Let's do it differently now and await it:

aggregate list of returned values. The order of result values

corresponds to the order of awaitables in *aws*.

If *return_exceptions* is ``False`` (default), the first

raised exception is immediately propagated to the task that

awaits on ``gather()``. Other awaitables in the *aws* sequence

**won't be cancelled** and will continue to run.

If *return_exceptions* is ``True``, exceptions are treated the

same as successful results, and aggregated in the result list.

Otherwise, the first raised exception is immediately propagated

to the task that awaits on ``gather()``.

If ``gather`` is *cancelled*, all submitted awaitables

If ``gather()`` is *cancelled*, all submitted awaitables

(that have not completed yet) are also *cancelled*.

If any Task or Future from the *aws* sequence is *cancelled*, it is

propagated regardless of *return_exceptions*.

Shielding Tasks From Cancellation

=================================

Shielding From Cancellation

===========================

.. awaitablefunction:: shield(aw, \*, loop=None)

Protect an :ref:`awaitable object <asyncio-awaitables>`

from being :meth:`cancelled <Task.cancel>`.

*aw* can be a coroutine, a Task, or a Future-like object. If

*aw* is a coroutine it is automatically scheduled as a Task.

If *aw* is a coroutine it is automatically scheduled as a Task.

The statement::

.. class:: Task(coro, \*, loop=None)

A :class:`Future`-like object that wraps a Python

A :class:`Future-like <Future>` object that runs a Python

:ref:`coroutine <coroutine>`. Not thread-safe.

Tasks are used to run coroutines in event loops.

is used to get the current loop.

This method is **deprecated** and will be removed in

Python 3.9. Use the :func:`all_tasks` function instead.

Python 3.9. Use the :func:`asyncio.all_tasks` function instead.

.. classmethod:: current_task(loop=None)

is used to get the current loop.

This method is **deprecated** and will be removed in

Python 3.9. Use the :func:`current_task` function instead.

Python 3.9. Use the :func:`asyncio.current_task` function

instead.

.. _asyncio_generator_based_coro: