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Disable Function : 3 \a @sdZddddddddd d d d d g ZddlZddlZddlZddlZddlZddlm Z ddlm Z ddlm Z ddlm Z ddlm Z ddl mZGddde jZeZy ddlZWnek rYn XejZZej jZej jZej jZeddedddZddZeddddZeddZddd d!dZed/ddd"dZddd#d$Zeed <d e_ [ddd%d Z!ed&d'Z"Gd(d)d)e jZ#dd*d+d,d Z$ddd-d Z%d.d Z&dS)0z0Support for tasks, coroutines and the scheduler.TaskFIRST_COMPLETEDFIRST_EXCEPTION ALL_COMPLETEDwaitwait_for as_completedsleepasyncgathershield ensure_futurerun_coroutine_threadsafeN) base_tasks)compat) coroutines)events)futures) coroutinecseZdZdZejZiZdZe dddZ e dddZ ddfd d Z e jrXd d Zd dZddddZdddddZddZdfdd ZddZZS)rz A coroutine wrapped in a Future.TNcCs|dkrtj}|jj|S)zReturn the currently running task in an event loop or None. By default the current task for the current event loop is returned. None is returned when called not in the context of a Task. N)rget_event_loop_current_tasksget)clsloopr/usr/lib64/python3.6/tasks.py current_task.szTask.current_taskcs$dkrtjfdd|jDS)z|Return a set of all tasks for an event loop. 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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. )rZ_task_get_stack)r2r;rrr get_stackaszTask.get_stack)r;filecCstj|||S)anPrint 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. )rZ_task_print_stack)r2r;r=rrr print_stackxs zTask.print_stackcCs4d|_|jrdS|jdk r*|jjr*dSd|_dS)aRequest that this task cancel itself. 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FNT)Z_log_tracebackdoner,cancelr-)r2rrrr@s  z Task.cancelcs|j stdj|||jr:t|tjs4tj}d|_|j}d|_||j j |j <zy"|dkrn|j d}n |j |}Wntk r}z.|jrd|_|jtjn |j|jWYdd}~Xntjk rtjYn~tk r}z|j|WYdd}~XnPtk rD}z|j|WYdd}~Xn Xt|dd}|dk r|j |j k r|j j|jtdj||n||r||kr|j j|jtdj|n2d|_|j|j||_|jr|jjrd|_n|j j|jtdj||n^|dkr |j j|jnDtj|rJ|j j|jtdj||n|j j|jtdj|Wd|j j j|j d}XdS) Nz!_step(): already done: {!r}, {!r}F_asyncio_future_blockingz6Task {!r} got Future {!r} attached to a different loopz!Task cannot await on itself: {!r}z;yield was used instead of yield from in task {!r} with {!r}zIyield was used instead of yield from for generator in task {!r} with {!r}zTask got bad yield: {!r}) r?r&formatr- isinstancerCancelledErrorr+r,r0rrsendthrow StopIteration set_exception set_resultvaluer(r@ Exception BaseExceptiongetattrr.r/ RuntimeErrorrAadd_done_callback_wakeupinspectZ isgeneratorpop)r2excr3resultZblocking)r0rrr/s            z Task._stepcCsJy |jWn,tk r8}z|j|WYdd}~Xn X|jd}dS)N)rTrKr/)r2futurerSrrrrPs  z Task._wakeup)N)N)N)__name__ __module__ __qualname____doc__weakrefWeakSetr"rr6 classmethodrr#r)rZPY34r8r:r<r>r@r/rP __classcell__rr)r0rrs"     !T)rtimeout return_whenc#stj|stj|r&tdt|j|s2td|tt t fkrNtdj |dkr^t j fddt|D}t|||EdHS)aWait for the Futures and coroutines given by fs to complete. 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N)r)rr create_future call_laterrj functoolspartialr rOrrDremove_done_callbackr@r?rT TimeoutError)futr^rrhtimeout_handlecbrrrrAs,       c #s|s td|jd|dk r.|j|tt|fdd}x|D]}|j|qNWzEdHWddk rjXtt}}x4|D],}|j||j r|j |q|j |qW||fS)zeInternal helper for wait() and wait_for(). The fs argument must be a collection of Futures. zSet of Futures is empty.Ncs\d8dks6tks6tkrX|j rX|jdk rXdk rFjjsXjddS)Nrr)rr cancelled exceptionr@r?rI)r`)counterr_rrrhrr_on_completion|s z_wait.._on_completion) r&rkrlrjlenrOr@reror?r1)rgr^r_rrwr`r?pendingr)rvr_rrrhrrfos(      rf)rr^c#stj|stj|r&tdt|jdk r2ntjfddt |Dddl m }|ddfdd }fd d t fd d }xD]}|j qWr|dk rʈj||xttD] }|VqWdS)amReturn an iterator whose values are coroutines. When waiting for the yielded coroutines you'll get the results (or exceptions!) of the original Futures (or coroutines), in the order in which and as soon as they complete. This differs from PEP 3148; the proper way to use this is: for f in as_completed(fs): result = yield from f # The 'yield from' may raise. # Use result. If a timeout is specified, the 'yield from' will raise TimeoutError when the timeout occurs before all Futures are done. Note: The futures 'f' are not necessarily members of fs. z expect a list of futures, not %sNcsh|]}t|dqS))r)r )rr`)rrrr!szas_completed..r)Queue)rcs.x D]}|jjdqWjdS)N)ro put_nowaitclear)r`)rwr?todorr _on_timeouts  z!as_completed.._on_timeoutcs6sdSj|j| r2dk r2jdS)N)remover{r@)r`)r?rrr}rrrws   z$as_completed.._on_completionc3s$jEdH}|dkrtj|jS)N)rrrprT)r`)r?rr _wait_for_onesz#as_completed.._wait_for_one)rrarr%rbrcrVrrreZqueuesrzrrOrlrangerx)rgrr^rzr~rr`_r)rwr?rrrr}rrs      c csX|dkrdV|S|dkr"tj}|j}|jj|tj||}z |EdHS|jXdS)z9Coroutine that completes after a given time (in seconds).rN)rrrkrrlrZ_set_result_unless_cancelledr@)ZdelayrTrrUhrrrrs cCstjdtddt||dS)zWrap a coroutine in a future. 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This overrides cancel() to cancel all the children and act more like Task.cancel(), which doesn't immediately mark itself as cancelled. N)rcstj|d||_d|_dS)N)rF)r(r) _children_cancel_requested)r2childrenr)r0rrr)$sz_GatheringFuture.__init__cCs:|jr dSd}x|jD]}|jrd}qW|r6d|_|S)NFT)r?rr@r)r2ZretZchildrrrr@)s z_GatheringFuture.cancel)rVrWrXrYr)r@r]rr)r0rrsrF)rreturn_exceptionscs|s*|dkrtj}|jjgSixjt|D]^}tj|sht||d}|dkr`|j}d|_ n&|}|dkr||j}n|j|k rt d||<q8Wfdd|D}t |t ||dddgfdd }x&t |D]\}}|jtj||qWS) a7Return a future aggregating results from the given coroutines or 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.) 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