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bpo-46752: Slight improvements to TaskGroup API#31398

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gvanrossum merged 3 commits intopython:mainfromgvanrossum:rm-tg-name
Feb 18, 2022
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Remove task group names (for now)
We're not sure that they are needed, and once in the codewe would never be able to get rid of them.Yury wrote:> Ideally, there should be a way for someone to build a "trace"> of taskgroups/task leading to the current running task.> We could do that using contextvars, but I'm not sure we should> do that in 3.11.
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@gvanrossum
gvanrossum committedFeb 17, 2022
commit32468ef98e0e8c9e83fe9d738571b886774d5c43
12 changes: 2 additions & 10 deletionsLib/asyncio/taskgroups.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,12 +15,7 @@

class TaskGroup:

def __init__(self, *, name=None):
if name is None:
self._name = f'tg-{_name_counter()}'
else:
self._name = str(name)

def __init__(self):
self._entered = False
self._exiting = False
self._aborting = False
Expand All@@ -33,11 +28,8 @@ def __init__(self, *, name=None):
self._base_error = None
self._on_completed_fut = None

def get_name(self):
return self._name

def __repr__(self):
msg = f'<TaskGroup {self._name!r}'
msg = f'<TaskGroup'
if self._tasks:
msg += f' tasks:{len(self._tasks)}'
if self._unfinished_tasks:
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12 changes: 6 additions & 6 deletionsLib/test/test_asyncio/test_taskgroups.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -368,10 +368,10 @@ async def crash_after(t):
raise ValueError(t)

async def runner():
async with taskgroups.TaskGroup(name='g1') as g1:
async with taskgroups.TaskGroup() as g1:
g1.create_task(crash_after(0.1))

async with taskgroups.TaskGroup(name='g2') as g2:
async with taskgroups.TaskGroup() as g2:
g2.create_task(crash_after(0.2))

r = asyncio.create_task(runner())
Expand All@@ -387,10 +387,10 @@ async def crash_after(t):
raise ValueError(t)

async def runner():
async with taskgroups.TaskGroup(name='g1') as g1:
async with taskgroups.TaskGroup() as g1:
g1.create_task(crash_after(10))

async with taskgroups.TaskGroup(name='g2') as g2:
async with taskgroups.TaskGroup() as g2:
g2.create_task(crash_after(0.1))

r = asyncio.create_task(runner())
Expand All@@ -407,7 +407,7 @@ async def crash_soon():
1 / 0

async def runner():
async with taskgroups.TaskGroup(name='g1') as g1:
async with taskgroups.TaskGroup() as g1:
g1.create_task(crash_soon())
try:
await asyncio.sleep(10)
Expand All@@ -430,7 +430,7 @@ async def crash_soon():
1 / 0

async def nested_runner():
async with taskgroups.TaskGroup(name='g1') as g1:
async with taskgroups.TaskGroup() as g1:
g1.create_task(crash_soon())
try:
await asyncio.sleep(10)
Expand Down
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