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bpo-42392: Remove loop parameter from asyncio.tasks and asyncio.subprocess (GH-23521)

This commit is contained in:
Yurii Karabas 2020-11-28 10:21:17 +02:00 committed by GitHub
parent f9195318a8
commit e4fe303b8c
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 66 additions and 158 deletions
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9
Lib/asyncio/base_events.py
View File

@ -350,7 +350,7 @@ class Server(events.AbstractServer):
self._start_serving()
# Skip one loop iteration so that all 'loop.add_reader'
# go through.
await tasks.sleep(0, loop=self._loop)
await tasks.sleep(0)
async def serve_forever(self):
if self._serving_forever_fut is not None:
@ -541,8 +541,7 @@ class BaseEventLoop(events.AbstractEventLoop):
results = await tasks.gather(
*[ag.aclose() for ag in closing_agens],
return_exceptions=True,
loop=self)
return_exceptions=True)
for result, agen in zip(results, closing_agens):
if isinstance(result, Exception):
@ -1457,7 +1456,7 @@ class BaseEventLoop(events.AbstractEventLoop):
fs = [self._create_server_getaddrinfo(host, port, family=family,
flags=flags)
for host in hosts]
infos = await tasks.gather(*fs, loop=self)
infos = await tasks.gather(*fs)
infos = set(itertools.chain.from_iterable(infos))
completed = False
@ -1515,7 +1514,7 @@ class BaseEventLoop(events.AbstractEventLoop):
server._start_serving()
# Skip one loop iteration so that all 'loop.add_reader'
# go through.
await tasks.sleep(0, loop=self)
await tasks.sleep(0)
if self._debug:
logger.info("%r is serving", server)

3
Lib/asyncio/runners.py
View File

@ -60,8 +60,7 @@ def _cancel_all_tasks(loop):
for task in to_cancel:
task.cancel()
loop.run_until_complete(
tasks.gather(*to_cancel, loop=loop, return_exceptions=True))
loop.run_until_complete(tasks.gather(*to_cancel, return_exceptions=True))
for task in to_cancel:
if task.cancelled():

30
Lib/asyncio/subprocess.py
View File

@ -1,7 +1,6 @@
__all__ = 'create_subprocess_exec', 'create_subprocess_shell'
import subprocess
import warnings
from . import events
from . import protocols
@ -193,24 +192,14 @@ class Process:
stderr = self._read_stream(2)
else:
stderr = self._noop()
stdin, stdout, stderr = await tasks.gather(stdin, stdout, stderr,
loop=self._loop)
stdin, stdout, stderr = await tasks.gather(stdin, stdout, stderr)
await self.wait()
return (stdout, stderr)
async def create_subprocess_shell(cmd, stdin=None, stdout=None, stderr=None,
loop=None, limit=streams._DEFAULT_LIMIT,
**kwds):
if loop is None:
loop = events.get_event_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8 "
"and scheduled for removal in Python 3.10.",
DeprecationWarning,
stacklevel=2
)
limit=streams._DEFAULT_LIMIT, **kwds):
loop = events.get_running_loop()
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
loop=loop)
transport, protocol = await loop.subprocess_shell(
@ -221,16 +210,9 @@ async def create_subprocess_shell(cmd, stdin=None, stdout=None, stderr=None,
async def create_subprocess_exec(program, *args, stdin=None, stdout=None,
stderr=None, loop=None,
limit=streams._DEFAULT_LIMIT, **kwds):
if loop is None:
loop = events.get_event_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8 "
"and scheduled for removal in Python 3.10.",
DeprecationWarning,
stacklevel=2
)
stderr=None, limit=streams._DEFAULT_LIMIT,
**kwds):
loop = events.get_running_loop()
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
loop=loop)
transport, protocol = await loop.subprocess_exec(

45
Lib/asyncio/tasks.py
View File

@ -370,7 +370,7 @@ FIRST_EXCEPTION = concurrent.futures.FIRST_EXCEPTION
ALL_COMPLETED = concurrent.futures.ALL_COMPLETED
async def wait(fs, *, loop=None, timeout=None, return_when=ALL_COMPLETED):
async def wait(fs, *, timeout=None, return_when=ALL_COMPLETED):
"""Wait for the Futures and coroutines given by fs to complete.
The fs iterable must not be empty.
@ -393,12 +393,7 @@ async def wait(fs, *, loop=None, timeout=None, return_when=ALL_COMPLETED):
if return_when not in (FIRST_COMPLETED, FIRST_EXCEPTION, ALL_COMPLETED):
raise ValueError(f'Invalid return_when value: {return_when}')
if loop is None:
loop = events.get_running_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
fs = set(fs)
@ -418,7 +413,7 @@ def _release_waiter(waiter, *args):
waiter.set_result(None)
async def wait_for(fut, timeout, *, loop=None):
async def wait_for(fut, timeout):
"""Wait for the single Future or coroutine to complete, with timeout.
Coroutine will be wrapped in Task.
@ -431,12 +426,7 @@ async def wait_for(fut, timeout, *, loop=None):
This function is a coroutine.
"""
if loop is None:
loop = events.get_running_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
if timeout is None:
return await fut
@ -556,7 +546,7 @@ async def _cancel_and_wait(fut, loop):
# This is *not* a @coroutine! It is just an iterator (yielding Futures).
def as_completed(fs, *, loop=None, timeout=None):
def as_completed(fs, *, timeout=None):
"""Return an iterator whose values are coroutines.
When waiting for the yielded coroutines you'll get the results (or
@ -580,12 +570,7 @@ def as_completed(fs, *, loop=None, timeout=None):
from .queues import Queue # Import here to avoid circular import problem.
done = Queue()
if loop is None:
loop = events.get_event_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
todo = {ensure_future(f, loop=loop) for f in set(fs)}
timeout_handle = None
@ -630,19 +615,13 @@ def __sleep0():
yield
async def sleep(delay, result=None, *, loop=None):
async def sleep(delay, result=None):
"""Coroutine that completes after a given time (in seconds)."""
if delay <= 0:
await __sleep0()
return result
if loop is None:
loop = events.get_running_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
future = loop.create_future()
h = loop.call_later(delay,
futures._set_result_unless_cancelled,
@ -717,7 +696,7 @@ class _GatheringFuture(futures.Future):
return ret
def gather(*coros_or_futures, loop=None, return_exceptions=False):
def gather(*coros_or_futures, return_exceptions=False):
"""Return a future aggregating results from the given coroutines/futures.
Coroutines will be wrapped in a future and scheduled in the event
@ -748,12 +727,7 @@ def gather(*coros_or_futures, loop=None, return_exceptions=False):
gather won't cancel any other awaitables.
"""
if not coros_or_futures:
if loop is None:
loop = events.get_event_loop()
else:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
outer = loop.create_future()
outer.set_result([])
return outer
@ -817,6 +791,7 @@ def gather(*coros_or_futures, loop=None, return_exceptions=False):
children = []
nfuts = 0
nfinished = 0
loop = None
for arg in coros_or_futures:
if arg not in arg_to_fut:
fut = ensure_future(arg, loop=loop)
@ -843,7 +818,7 @@ def gather(*coros_or_futures, loop=None, return_exceptions=False):
return outer
def shield(arg, *, loop=None):
def shield(arg):
"""Wait for a future, shielding it from cancellation.
The statement
@ -869,11 +844,7 @@ def shield(arg, *, loop=None):
except CancelledError:
res = None
"""
if loop is not None:
warnings.warn("The loop argument is deprecated since Python 3.8, "
"and scheduled for removal in Python 3.10.",
DeprecationWarning, stacklevel=2)
inner = ensure_future(arg, loop=loop)
inner = ensure_future(arg)
if inner.done():
# Shortcut.
return inner

2
Lib/asyncio/unix_events.py
View File

@ -323,7 +323,7 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
server._start_serving()
# Skip one loop iteration so that all 'loop.add_reader'
# go through.
await tasks.sleep(0, loop=self)
await tasks.sleep(0)
return server

8
Lib/test/test_asyncio/test_queues.py
View File

@ -255,6 +255,7 @@ class QueueGetTests(_QueueTestBase):
def test_why_are_getters_waiting(self):
# From issue #268.
asyncio.set_event_loop(self.loop)
async def consumer(queue, num_expected):
for _ in range(num_expected):
@ -276,8 +277,7 @@ class QueueGetTests(_QueueTestBase):
self.loop.run_until_complete(
asyncio.gather(producer(q, producer_num_items),
consumer(q, producer_num_items),
loop=self.loop),
consumer(q, producer_num_items)),
)
def test_cancelled_getters_not_being_held_in_self_getters(self):
@ -498,6 +498,7 @@ class QueuePutTests(_QueueTestBase):
def test_why_are_putters_waiting(self):
# From issue #265.
asyncio.set_event_loop(self.loop)
async def create_queue():
q = asyncio.Queue(2)
@ -519,8 +520,7 @@ class QueuePutTests(_QueueTestBase):
t1 = putter(1)
t2 = putter(2)
t3 = putter(3)
self.loop.run_until_complete(
asyncio.gather(getter(), t0, t1, t2, t3, loop=self.loop))
self.loop.run_until_complete(asyncio.gather(getter(), t0, t1, t2, t3))
def test_cancelled_puts_not_being_held_in_self_putters(self):
def a_generator():

20
Lib/test/test_asyncio/test_subprocess.py
View File

@ -635,26 +635,6 @@ class SubprocessMixin:
self.assertIsNone(self.loop.run_until_complete(execute()))
def test_exec_loop_deprecated(self):
async def go():
with self.assertWarns(DeprecationWarning):
proc = await asyncio.create_subprocess_exec(
sys.executable, '-c', 'pass',
loop=self.loop,
)
await proc.wait()
self.loop.run_until_complete(go())
def test_shell_loop_deprecated(self):
async def go():
with self.assertWarns(DeprecationWarning):
proc = await asyncio.create_subprocess_shell(
"exit 0",
loop=self.loop,
)
await proc.wait()
self.loop.run_until_complete(go())
if sys.platform != 'win32':
# Unix

83
Lib/test/test_asyncio/test_tasks.py
View File

@ -155,7 +155,7 @@ class BaseTaskTests:
self.loop.run_until_complete(
asyncio.gather(*[
self.new_task(self.loop, run()) for _ in range(100)
], loop=self.loop))
]))
def test_other_loop_future(self):
other_loop = asyncio.new_event_loop()
@ -1603,10 +1603,10 @@ class BaseTaskTests:
async def foo():
values = []
for f in asyncio.as_completed([b, c, a], loop=loop):
for f in asyncio.as_completed([b, c, a]):
values.append(await f)
return values
with self.assertWarns(DeprecationWarning):
res = loop.run_until_complete(self.new_task(loop, foo()))
self.assertAlmostEqual(0.15, loop.time())
self.assertTrue('a' in res[:2])
@ -1614,7 +1614,6 @@ class BaseTaskTests:
self.assertEqual(res[2], 'c')
# Doing it again should take no time and exercise a different path.
with self.assertWarns(DeprecationWarning):
res = loop.run_until_complete(self.new_task(loop, foo()))
self.assertAlmostEqual(0.15, loop.time())
@ -1633,7 +1632,7 @@ class BaseTaskTests:
async def foo():
values = []
for f in asyncio.as_completed([a, b], timeout=0.12, loop=loop):
for f in asyncio.as_completed([a, b], timeout=0.12):
if values:
loop.advance_time(0.02)
try:
@ -1643,7 +1642,6 @@ class BaseTaskTests:
values.append((2, exc))
return values
with self.assertWarns(DeprecationWarning):
res = loop.run_until_complete(self.new_task(loop, foo()))
self.assertEqual(len(res), 2, res)
self.assertEqual(res[0], (1, 'a'))
@ -1667,11 +1665,10 @@ class BaseTaskTests:
a = asyncio.sleep(0.01, 'a')
async def foo():
for f in asyncio.as_completed([a], timeout=1, loop=loop):
for f in asyncio.as_completed([a], timeout=1):
v = await f
self.assertEqual(v, 'a')
with self.assertWarns(DeprecationWarning):
loop.run_until_complete(self.new_task(loop, foo()))
def test_as_completed_reverse_wait(self):
@ -1682,13 +1679,13 @@ class BaseTaskTests:
yield 0
loop = self.new_test_loop(gen)
asyncio.set_event_loop(loop)
a = asyncio.sleep(0.05, 'a')
b = asyncio.sleep(0.10, 'b')
fs = {a, b}
with self.assertWarns(DeprecationWarning):
futs = list(asyncio.as_completed(fs, loop=loop))
futs = list(asyncio.as_completed(fs))
self.assertEqual(len(futs), 2)
x = loop.run_until_complete(futs[1])
@ -1709,12 +1706,13 @@ class BaseTaskTests:
yield 0.05
loop = self.new_test_loop(gen)
asyncio.set_event_loop(loop)
a = asyncio.sleep(0.05, 'a')
b = asyncio.sleep(0.05, 'b')
fs = {a, b}
with self.assertWarns(DeprecationWarning):
futs = list(asyncio.as_completed(fs, loop=loop))
futs = list(asyncio.as_completed(fs))
self.assertEqual(len(futs), 2)
waiter = asyncio.wait(futs)
# Deprecation from passing coros in futs to asyncio.wait()
@ -1734,12 +1732,10 @@ class BaseTaskTests:
def runner():
result = []
c = coro('ham')
for f in asyncio.as_completed([c, c, coro('spam')],
loop=self.loop):
for f in asyncio.as_completed([c, c, coro('spam')]):
result.append((yield from f))
return result
with self.assertWarns(DeprecationWarning):
fut = self.new_task(self.loop, runner())
self.loop.run_until_complete(fut)
result = fut.result()
@ -2018,7 +2014,7 @@ class BaseTaskTests:
self.assertIsNone(asyncio.current_task(loop=self.loop))
async def coro(loop):
self.assertIs(asyncio.current_task(loop=loop), task)
self.assertIs(asyncio.current_task(), task)
self.assertIs(asyncio.current_task(None), task)
self.assertIs(asyncio.current_task(), task)
@ -2034,16 +2030,16 @@ class BaseTaskTests:
fut2 = self.new_future(self.loop)
async def coro1(loop):
self.assertTrue(asyncio.current_task(loop=loop) is task1)
self.assertTrue(asyncio.current_task() is task1)
await fut1
self.assertTrue(asyncio.current_task(loop=loop) is task1)
self.assertTrue(asyncio.current_task() is task1)
fut2.set_result(True)
async def coro2(loop):
self.assertTrue(asyncio.current_task(loop=loop) is task2)
self.assertTrue(asyncio.current_task() is task2)
fut1.set_result(True)
await fut2
self.assertTrue(asyncio.current_task(loop=loop) is task2)
self.assertTrue(asyncio.current_task() is task2)
task1 = self.new_task(self.loop, coro1(self.loop))
task2 = self.new_task(self.loop, coro2(self.loop))
@ -2210,10 +2206,10 @@ class BaseTaskTests:
# as_completed() expects a list of futures, not a future instance
self.assertRaises(TypeError, self.loop.run_until_complete,
asyncio.as_completed(fut, loop=self.loop))
asyncio.as_completed(fut))
coro = coroutine_function()
self.assertRaises(TypeError, self.loop.run_until_complete,
asyncio.as_completed(coro, loop=self.loop))
asyncio.as_completed(coro))
coro.close()
def test_wait_invalid_args(self):
@ -2511,6 +2507,7 @@ class BaseTaskTests:
"""Ensure that a gathering future refuses to be cancelled once all
children are done"""
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
self.addCleanup(loop.close)
fut = self.new_future(loop)
@ -2518,7 +2515,7 @@ class BaseTaskTests:
# gathering task is done at the same time as the child future
def child_coro():
return (yield from fut)
gather_future = asyncio.gather(child_coro(), loop=loop)
gather_future = asyncio.gather(child_coro())
gather_task = asyncio.ensure_future(gather_future, loop=loop)
cancel_result = None
@ -2555,8 +2552,7 @@ class BaseTaskTests:
while True:
time += 0.05
await asyncio.gather(asyncio.sleep(0.05),
return_exceptions=True,
loop=loop)
return_exceptions=True)
if time > 1:
return
@ -2771,7 +2767,7 @@ class BaseTaskTests:
task = loop.create_task(sub(random.randint(0, 10)))
tasks.append(task)
await asyncio.gather(*tasks, loop=loop)
await asyncio.gather(*tasks)
loop = asyncio.new_event_loop()
try:
@ -3328,9 +3324,6 @@ class FutureGatherTests(GatherTestsBase, test_utils.TestCase):
self._run_loop(self.one_loop)
self.assertTrue(fut.done())
self.assertEqual(fut.result(), [])
with self.assertWarns(DeprecationWarning):
fut = asyncio.gather(*seq_or_iter, loop=self.other_loop)
self.assertIs(fut._loop, self.other_loop)
def test_constructor_empty_sequence(self):
self._check_empty_sequence([])
@ -3343,8 +3336,6 @@ class FutureGatherTests(GatherTestsBase, test_utils.TestCase):
fut2 = self.other_loop.create_future()
with self.assertRaises(ValueError):
asyncio.gather(fut1, fut2)
with self.assertRaises(ValueError):
asyncio.gather(fut1, loop=self.other_loop)
def test_constructor_homogenous_futures(self):
children = [self.other_loop.create_future() for i in range(3)]
@ -3352,7 +3343,7 @@ class FutureGatherTests(GatherTestsBase, test_utils.TestCase):
self.assertIs(fut._loop, self.other_loop)
self._run_loop(self.other_loop)
self.assertFalse(fut.done())
fut = asyncio.gather(*children, loop=self.other_loop)
fut = asyncio.gather(*children)
self.assertIs(fut._loop, self.other_loop)
self._run_loop(self.other_loop)
self.assertFalse(fut.done())
@ -3423,9 +3414,10 @@ class CoroutineGatherTests(GatherTestsBase, test_utils.TestCase):
self.one_loop.run_until_complete(fut)
self.set_event_loop(self.other_loop, cleanup=False)
asyncio.set_event_loop(self.other_loop)
gen3 = coro()
gen4 = coro()
fut2 = asyncio.gather(gen3, gen4, loop=self.other_loop)
fut2 = asyncio.gather(gen3, gen4)
self.assertIs(fut2._loop, self.other_loop)
self.other_loop.run_until_complete(fut2)
@ -3435,7 +3427,7 @@ class CoroutineGatherTests(GatherTestsBase, test_utils.TestCase):
def coro(s):
return s
c = coro('abc')
fut = asyncio.gather(c, c, coro('def'), c, loop=self.one_loop)
fut = asyncio.gather(c, c, coro('def'), c)
self._run_loop(self.one_loop)
self.assertEqual(fut.result(), ['abc', 'abc', 'def', 'abc'])
@ -3455,7 +3447,7 @@ class CoroutineGatherTests(GatherTestsBase, test_utils.TestCase):
async def outer():
nonlocal proof, gatherer
gatherer = asyncio.gather(child1, child2, loop=self.one_loop)
gatherer = asyncio.gather(child1, child2)
await gatherer
proof += 100
@ -3482,7 +3474,7 @@ class CoroutineGatherTests(GatherTestsBase, test_utils.TestCase):
b = self.one_loop.create_future()
async def outer():
await asyncio.gather(inner(a), inner(b), loop=self.one_loop)
await asyncio.gather(inner(a), inner(b))
f = asyncio.ensure_future(outer(), loop=self.one_loop)
test_utils.run_briefly(self.one_loop)
@ -3621,11 +3613,6 @@ class SleepTests(test_utils.TestCase):
self.loop.run_until_complete(coro())
self.assertEqual(result, 11)
def test_loop_argument_is_deprecated(self):
# Remove test when loop argument is removed in Python 3.10
with self.assertWarns(DeprecationWarning):
self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
class WaitTests(test_utils.TestCase):
def setUp(self):
@ -3638,18 +3625,6 @@ class WaitTests(test_utils.TestCase):
self.loop = None
super().tearDown()
def test_loop_argument_is_deprecated_in_wait(self):
# Remove test when loop argument is removed in Python 3.10
with self.assertWarns(DeprecationWarning):
self.loop.run_until_complete(
asyncio.wait([coroutine_function()], loop=self.loop))
def test_loop_argument_is_deprecated_in_wait_for(self):
# Remove test when loop argument is removed in Python 3.10
with self.assertWarns(DeprecationWarning):
self.loop.run_until_complete(
asyncio.wait_for(coroutine_function(), 0.01, loop=self.loop))
def test_coro_is_deprecated_in_wait(self):
# Remove test when passing coros to asyncio.wait() is removed in 3.11
with self.assertWarns(DeprecationWarning):
@ -3701,7 +3676,7 @@ class CompatibilityTests(test_utils.TestCase):
return 'ok2'
async def inner():
return await asyncio.gather(coro1(), coro2(), loop=self.loop)
return await asyncio.gather(coro1(), coro2())
result = self.loop.run_until_complete(inner())
self.assertEqual(['ok1', 'ok2'], result)

2
Misc/NEWS.d/next/Library/2020-11-26-12-40-16.bpo-42392.GbmdHE.rst Normal file
View File

@ -0,0 +1,2 @@
Remove loop parameter from ``asyncio.subprocess`` and ``asyncio.tasks``
functions. Patch provided by Yurii Karabas.