U a)@sLddlZddlZddlmZddZedZeZGdddZddZ dS) N)func_accepts_kwargscCs&t|drt|jt|jfSt|S)N__func__)hasattrid__self__r)targetr/home/adriano.carvalho/ftp/files/BrinquedotecaVirtual/brinquedotecavirtual/venv/lib/python3.8/site-packages/django/dispatch/dispatcher.py_make_ids r c@sbeZdZdZdddZdddZdd d Zdd d Zd dZddZ ddZ ddZ dddZ dS)Signalz Base class for all signals Internal attributes: receivers { receiverkey (id) : weakref(receiver) } NFcCsHg|_|dkrg}t||_t|_||_|r8tni|_ d|_ dS)z Create a new signal. providing_args A list of the arguments this signal can pass along in a send() call. NF) receiverssetproviding_args threadingLocklock use_cachingweakrefWeakKeyDictionarysender_receivers_cache_dead_receivers)selfrrrrr __init__s  zSignal.__init__Tc sddlm}|jr8|jr8t|s(tdt|s8td|rJ|t|fnt|t|f|rt j }|}t |drt |drt j }|j }||}t ||j|j@|tfdd|jDs|j|f|jW5QRXd S) a Connect receiver to sender for signal. Arguments: receiver A function or an instance method which is to receive signals. Receivers must be hashable objects. If weak is True, then receiver must be weak referenceable. Receivers must be able to accept keyword arguments. If a receiver is connected with a dispatch_uid argument, it will not be added if another receiver was already connected with that dispatch_uid. sender The sender to which the receiver should respond. Must either be a Python object, or None to receive events from any sender. weak Whether to use weak references to the receiver. By default, the module will attempt to use weak references to the receiver objects. If this parameter is false, then strong references will be used. dispatch_uid An identifier used to uniquely identify a particular instance of a receiver. This will usually be a string, though it may be anything hashable. r)settingsz"Signal receivers must be callable.z:Signal receivers must accept keyword arguments (**kwargs).rrc3s|]\}}|kVqdSNr).0r_key_ lookup_keyrr msz!Signal.connect..N)Z django.confrZ configuredDEBUGcallableAssertionErrorr ValueErrorr rrefr WeakMethodrfinalize_remove_receiverr_clear_dead_receiversanyr appendrclear)rreceiversenderZweak dispatch_uidrr%Zreceiver_objectrrr connect1s*!  zSignal.connectc Cs|r|t|f}nt|t|f}d}|jR|tt|jD]*}|j|\}}||krDd}|j|=qpqD|jW5QRX|S)a Disconnect receiver from sender for signal. If weak references are used, disconnect need not be called. The receiver will be removed from dispatch automatically. Arguments: receiver The registered receiver to disconnect. May be none if dispatch_uid is specified. sender The registered sender to disconnect dispatch_uid the unique identifier of the receiver to disconnect FT)r rr)rangelenr rr,) rr-r.r/rZ disconnectedindexrrrrr disconnectqszSignal.disconnectcCst||Sr)bool_live_receivers)rr.rrr has_listenersszSignal.has_listenersc s6jrjtkrgSfddDS)a Send signal from sender to all connected receivers. If any receiver raises an error, the error propagates back through send, terminating the dispatch loop. So it's possible that all receivers won't be called if an error is raised. Arguments: sender The sender of the signal. Either a specific object or None. named Named arguments which will be passed to receivers. Return a list of tuple pairs [(receiver, response), ... ]. cs$g|]}||fdfqS)signalr.r)rr-namedrr.rr szSignal.send..)r rget NO_RECEIVERSr6)rr.r;rr:r sends z Signal.sendc Ks|jr|j|tkrgSg}||D]\}z|f||d|}Wn0tk rt}z|||fW5d}~XYq(X|||fq(|S)a Send signal from sender to all connected receivers catching errors. Arguments: sender The sender of the signal. Can be any Python object (normally one registered with a connect if you actually want something to occur). named Named arguments which will be passed to receivers. These arguments must be a subset of the argument names defined in providing_args. Return a list of tuple pairs [(receiver, response), ... ]. If any receiver raises an error (specifically any subclass of Exception), return the error instance as the result for that receiver. r8N)r rr=r>r6 Exceptionr+)rr.r; responsesr-responseerrrrr send_robusts zSignal.send_robustcCs"|jrd|_dd|jD|_dS)NFcSs.g|]&}t|dtjr&|ddks|qS)N) isinstancer ReferenceType)rrrrr r<sz0Signal._clear_dead_receivers..)rr )rrrr r)s zSignal._clear_dead_receiversc Csd}|jr(|js(|j|}|tkr(gS|dkr|jh|t|}g}|jD]&\\}}}|t ksn||krR| |qR|jr|st|j|<n ||j|<W5QRXg}|D]4}t |t j r|}|dk r| |q| |q|S)z Filter sequence of receivers to get resolved, live receivers. This checks for weak references and resolves them, then returning only live receivers. N)rrrr=r>rr)r r NONE_IDr+rFrrG)rr.r Z senderkeyZ receiverkeyZ r_senderkeyr-Znon_weak_receiversrrr r6s2       zSignal._live_receiverscCs d|_dS)NT)r)rr-rrr r(szSignal._remove_receiver)NF)NTN)NNN)N)N) __name__ __module__ __qualname____doc__rr0r4r7r?rDr)r6r(rrrr r s  @ $ $ 'r c sfdd}|S)a~ A decorator for connecting receivers to signals. Used by passing in the signal (or list of signals) and keyword arguments to connect:: @receiver(post_save, sender=MyModel) def signal_receiver(sender, **kwargs): ... @receiver([post_save, post_delete], sender=MyModel) def signals_receiver(sender, **kwargs): ... cs:tttfr(D]}|j|fqnj|f|Sr)rFlisttupler0)funcskwargsr9rr _decorators zreceiver.._decoratorr)r9rSrTrrRr r-s r-) rrZdjango.utils.inspectrr rIobjectr>r r-rrrr s ~