/usr/lib/python3.10/asyncio/__pycache__
Edit: /usr/lib/python3.10/asyncio/__pycache__/tasks.cpython-310.pyc (23973B)
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ALL_COMPLETEDwaitwait_for as_completedsleepgathershield
ensure_futurerun_coroutine_threadsafe current_task all_tasks_register_task_unregister_task _enter_task _leave_task N) GenericAlias )
base_tasks)
coroutines)events)
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_is_coroutinec C s | du rt } t| S )z!Return a currently executed task.N)r get_running_loop_current_tasksgetloop r" $/usr/lib/python3.10/asyncio/tasks.pyr # s
r c s^ du rt d} ztt}W n ty# |d7 }|dkr! Y nw nq fdd|D S )z'Return a set of all tasks for the loop.Nr Tr i c s& h | ]}t | u r| s|qS r" )r _get_loopdone).0tr r" r# = s z all_tasks..)r r list
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| _| jj| j| jd t| d S )Nr Fz a coroutine was expected, got zTask-context)super__init___source_tracebackr iscoroutine_log_destroy_pending TypeError_task_name_counter_namestr _must_cancel _fut_waiter_coro contextvars copy_context_context_loop call_soon _Task__stepr )selfcoror! r2 __class__r" r# r8 ] s
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Task.__init__c sF | j tjkr | jr | dd}| jr| j|d< | j| t d S )Nz%Task was destroyed but it is pending!)r1 messagesource_traceback) _stater _PENDINGr; r9 rF call_exception_handlerr7 __del__)rI r6 rK r" r# rR t s
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Task.get_namec C s t || _d S r. )r? r> )rI valuer" r" r# r/ s z
Task.set_namec C t d)Nz*Task does not support set_result operationr+ )rI resultr" r" r#
set_result zTask.set_resultc C r[ )Nz-Task does not support set_exception operationr\ )rI exceptionr" r" r#
set_exception r_ zTask.set_exception)limitc C s t | |S )a Return the list of stack frames for this task's coroutine.
If the coroutine is not done, this returns the stack where it is
suspended. If the coroutine has completed successfully or was
cancelled, this returns an empty list. If the coroutine was
terminated by an exception, this returns the list of traceback
frames.
The frames are always ordered from oldest to newest.
The optional limit gives the maximum number of frames to
return; by default all available frames are returned. Its
meaning differs depending on whether a stack or a traceback is
returned: the newest frames of a stack are returned, but the
oldest frames of a traceback are returned. (This matches the
behavior of the traceback module.)
For reasons beyond our control, only one stack frame is
returned for a suspended coroutine.
)r _task_get_stack)rI rb r" r" r# get_stack s zTask.get_stack)rb filec C s t | ||S )an Print the stack or traceback for this task's coroutine.
This produces output similar to that of the traceback module,
for the frames retrieved by get_stack(). The limit argument
is passed to get_stack(). The file argument is an I/O stream
to which the output is written; by default output is written
to sys.stderr.
)r _task_print_stack)rI rb re r" r" r# print_stack s zTask.print_stackc C s> d| _ | r dS | jdur| jj|drdS d| _|| _dS )a Request that this task cancel itself.
This arranges for a CancelledError to be thrown into the
wrapped coroutine on the next cycle through the event loop.
The coroutine then has a chance to clean up or even deny
the request using try/except/finally.
Unlike Future.cancel, this does not guarantee that the
task will be cancelled: the exception might be caught and
acted upon, delaying cancellation of the task or preventing
cancellation completely. The task may also return a value or
raise a different exception.
Immediately after this method is called, Task.cancelled() will
not return True (unless the task was already cancelled). A
task will be marked as cancelled when the wrapped coroutine
terminates with a CancelledError exception (even if cancel()
was not called).
FNmsgT)_log_tracebackr% rA cancelr@ _cancel_message)rI ri r" r" r# rk s
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| d } w )Nz_step(): already done: z, Frh _asyncio_future_blockingzTask z got Future z attached to a different loopr5 z Task cannot await on itself: z-yield was used instead of yield from in task z with z;yield was used instead of yield from for generator in task zTask got bad yield: )%r% r InvalidStateErrorr@
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"Wr )r2 c C s t }|| }t|| |S )z]Schedule the execution of a coroutine object in a spawn task.
Return a Task object.
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| D } t| || I d H S ) a Wait for the Futures and coroutines given by fs to complete.
The fs iterable must not be empty.
Coroutines will be wrapped in Tasks.
Returns two sets of Future: (done, pending).
Usage:
done, pending = await asyncio.wait(fs)
Note: This does not raise TimeoutError! Futures that aren't done
when the timeout occurs are returned in the second set.
z expect a list of futures, not z#Set of coroutines/Futures is empty.zInvalid return_when value: c s s | ]}t |V qd S r. )r r: r& fr" r" r# x s zwait..zThe explicit passing of coroutine objects to asyncio.wait() is deprecated since Python 3.8, and scheduled for removal in Python 3.11.
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| W W | S tjy } zt |d}~ww | w )a Wait for the single Future or coroutine to complete, with timeout.
Coroutine will be wrapped in Task.
Returns result of the Future or coroutine. When a timeout occurs,
it cancels the task and raises TimeoutError. To avoid the task
cancellation, wrap it in shield().
If the wait is cancelled, the task is also cancelled.
This function is a coroutine.
Nr r )r r r r% r] _cancel_and_waitr rp TimeoutError
create_future
call_laterr functoolspartialrz rk remove_done_callback)futr r! r~ r timeout_handlecbr" r" r# r sX
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s | sJ d| d|dur||tt| fdd}| D ]}|| q'zI dH W dur> | D ]}|| q@ndurQ | D ]}|| qSw t t }}| D ]}| rq| | qe| | qe||fS )zVInternal helper for wait().
The fs argument must be a collection of Futures.
zSet of Futures is empty.Nc sj d8 dkst kstkr-| s/| d ur1d ur" s3d d S d S d S d S d S )Nr r )r r cancelledr` rk r% r^ r counterr r r r" r# _on_completion s z _wait.._on_completion)
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r c c s dV dS )zSkip one event loop run cycle.
This is a private helper for 'asyncio.sleep()', used
when the 'delay' is set to 0. It uses a bare 'yield'
expression (which Task.__step knows how to handle)
instead of creating a Future object.
Nr" r" r" r" r# __sleep0E s
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|I dH W | S | w )z9Coroutine that completes after a given time (in seconds).r N)r r r r r r _set_result_unless_cancelledrk )delayr] r! r hr" r" r# r Q s
r r c C s t | |dS )zmWrap a coroutine or an awaitable in a future.
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r )_ensure_future)coro_or_futurer! r" r" r# r b s r c C s t | r|d ur|t | urtd| S d}t| s-t| r)t| } d}nt d|d u r7t
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r c c s | E dH S )zHelper for asyncio.ensure_future().
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that will later be wrapped in a Task by ensure_future().
N) __await__) awaitabler" r" r# r s r c s* e Zd ZdZ fddZdddZ ZS )_GatheringFuturezHelper for gather().
This overrides cancel() to cancel all the children and act more
like Task.cancel(), which doesn't immediately mark itself as
cancelled.
c s* |d usJ t j|d || _d| _d S )Nr F)r7 r8 _children_cancel_requested)rI childrenr! rK r" r# r8 s
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|dS )a Return a future aggregating results from the given coroutines/futures.
Coroutines will be wrapped in a future and scheduled in the event
loop. They will not necessarily be scheduled in the same order as
passed in.
All futures must share the same event loop. If all the tasks are
done successfully, the returned future's result is the list of
results (in the order of the original sequence, not necessarily
the order of results arrival). If *return_exceptions* is True,
exceptions in the tasks are treated the same as successful
results, and gathered in the result list; otherwise, the first
raised exception will be immediately propagated to the returned
future.
Cancellation: if the outer Future is cancelled, all children (that
have not completed yet) are also cancelled. If any child is
cancelled, this is treated as if it raised CancelledError --
the outer Future is *not* cancelled in this case. (This is to
prevent the cancellation of one child to cause other children to
be cancelled.)
If *return_exceptions* is False, cancelling gather() after it
has been marked done won't cancel any submitted awaitables.
For instance, gather can be marked done after propagating an
exception to the caller, therefore, calling ``gather.cancel()``
after catching an exception (raised by one of the awaitables) from
gather won't cancel any other awaitables.
c s d7 d u s r| s| d S s6| r'| }| d S | }|d ur6| d S kryg } D ]%} | rRt| jd u rMdn| j}n | }|d u r^| }| | q>j
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S t}| fdd fdd} | S )a Wait for a future, shielding it from cancellation.
The statement
task = asyncio.create_task(something())
res = await shield(task)
is exactly equivalent to the statement
res = await something()
*except* that if the coroutine containing it is cancelled, the
task running in something() is not cancelled. From the POV of
something(), the cancellation did not happen. But its caller is
still cancelled, so the yield-from expression still raises
CancelledError. Note: If something() is cancelled by other means
this will still cancel shield().
If you want to completely ignore cancellation (not recommended)
you can combine shield() with a try/except clause, as follows:
task = asyncio.create_task(something())
try:
res = await shield(task)
except CancelledError:
res = None
Save a reference to tasks passed to this function, to avoid
a task disappearing mid-execution. The event loop only keeps
weak references to tasks. A task that isn't referenced elsewhere
may get garbage collected at any time, even before it's done.
c s` r| s | d S | r d S | }|d ur' | d S | d S r. )r r` rk ra r^ r] )innerr~ r r" r# _inner_done_callbackO s z$shield.._inner_done_callbackc s s d S d S r. )r% r r )r r r" r# _outer_done_callback` r z$shield.._outer_done_callback)r r% r r$ r rz )r r! r r" )r r r r# r ' s !
r c s: t s tdtj fdd}| S )zsSubmit a coroutine object to a given event loop.
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z A coroutine object is requiredc
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c C t | dS )z3Register a new task in asyncio as executed by loop.N)r* r r1 r" r" r# r r c C s4 t | }|d urtd|d|d|t | < d S )NzCannot enter into task z while another task z is being executed.r r r+ r! r1 r r" r" r# r s
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