a ReO@sddlZddlZddlZddlZddlmZddlZddlZddlZddlm Z m Z m Z m Z m Z gdZejdejdfZejejejejgejejejffZdd Zd d Zd d ZddZddZee eeej eee eee eddZejddZejddZddZd;eeeejejdddZ dd*d+Z&Gd,d-d-Z'd.d/Z(d0d1Z)d2d3Z*d4d5Z+d)dd6d7d8Z,d)dd6d9d:Z-dS)?N)_uarray)BackendNotImplementedError _Function_SkipBackendContext_SetBackendContext _BackendState) set_backendset_global_backend skip_backendregister_backenddetermine_backenddetermine_backend_multiclear_backendscreate_multimethodgenerate_multimethodrr Dispatchablewrap_single_convertorwrap_single_convertor_instance all_of_typemark_as set_state get_state reset_staterrr.)r.c Csddl}zF||}|d}|}|D]}t||}q&|durJt||}|WSttfy}zddlm }||WYd}~n d}~00dS)Nr.)UnpicklingError) importlib import_modulesplitgetattrtypes MethodType ImportErrorAttributeErrorpickler) mod_nameqnameself_rmodulefuncqerr,O/var/www/sunrise/env/lib/python3.9/site-packages/scipy/_lib/_uarray/_backend.pyunpickle_function0s     r.cCszt|dd}t|dd}t|dd}zt|||}WntjyLd}Yn0||urltd|d|t|||ffS)N __module__ __qualname____self__z Can't pickle z: it's not the same object as )rr.r$r PicklingError)r)r%r&r'testr,r,r-pickle_functionDs    r4cCstjj|fSN)rr _unpickle_pickle)stater,r,r- pickle_stateVsr9cCs t|fSr5)rr7ctxr,r,r-pickle_set_backend_contextZsr<cCs t|fSr5)rr7r:r,r,r-pickle_skip_backend_context^sr=cCstS)z Returns an opaque object containing the current state of all the backends. Can be used for synchronization between threads/processes. See Also -------- set_state Sets the state returned by this function. )rrr,r,r,r-rhs rccs4ttdVWdn1s&0YdS)z Returns a context manager that resets all state once exited. See Also -------- set_state Context manager that sets the backend state. get_state Gets a state to be set by this context manager. N)rrr,r,r,r-rvs rc cs:t}t|zdVWt|dnt|d0dS)z A context manager that sets the state of the backends to one returned by :obj:`get_state`. See Also -------- get_state Gets a state to be set by this context manager. NT)rrr)r8 old_stater,r,r-rs  rcsfdd}|S)au Creates a decorator for generating multimethods. This function creates a decorator that can be used with an argument extractor in order to generate a multimethod. Other than for the argument extractor, all arguments are passed on to :obj:`generate_multimethod`. See Also -------- generate_multimethod Generates a multimethod. cst|gRiSr5)r)aargskwargsr,r-wrappersz#create_multimethod..wrapperr,)rArBrCr,r@r-rsr)argument_extractorargument_replacerdomaindefaultcCs,t|\}}}t||||||}t||S)a Generates a multimethod. Parameters ---------- argument_extractor : ArgumentExtractorType A callable which extracts the dispatchable arguments. Extracted arguments should be marked by the :obj:`Dispatchable` class. It has the same signature as the desired multimethod. argument_replacer : ArgumentReplacerType A callable with the signature (args, kwargs, dispatchables), which should also return an (args, kwargs) pair with the dispatchables replaced inside the args/kwargs. domain : str A string value indicating the domain of this multimethod. default: Optional[Callable], optional The default implementation of this multimethod, where ``None`` (the default) specifies there is no default implementation. Examples -------- In this example, ``a`` is to be dispatched over, so we return it, while marking it as an ``int``. The trailing comma is needed because the args have to be returned as an iterable. >>> def override_me(a, b): ... return Dispatchable(a, int), Next, we define the argument replacer that replaces the dispatchables inside args/kwargs with the supplied ones. >>> def override_replacer(args, kwargs, dispatchables): ... return (dispatchables[0], args[1]), {} Next, we define the multimethod. >>> overridden_me = generate_multimethod( ... override_me, override_replacer, "ua_examples" ... ) Notice that there's no default implementation, unless you supply one. >>> overridden_me(1, "a") Traceback (most recent call last): ... uarray.BackendNotImplementedError: ... >>> overridden_me2 = generate_multimethod( ... override_me, override_replacer, "ua_examples", default=lambda x, y: (x, y) ... ) >>> overridden_me2(1, "a") (1, 'a') See Also -------- uarray See the module documentation for how to override the method by creating backends. ) get_defaultsr functoolsupdate_wrapper)rDrErFrG kw_defaults arg_defaultsoptsZua_funcr,r,r-rs> rFcCs\z|jd||fWSty*i|_Ynty:Yn0t|||}||jd||f<|S)a A context manager that sets the preferred backend. Parameters ---------- backend The backend to set. coerce Whether or not to coerce to a specific backend's types. Implies ``only``. only Whether or not this should be the last backend to try. See Also -------- skip_backend: A context manager that allows skipping of backends. set_global_backend: Set a single, global backend for a domain. set) __ua_cache__r#KeyErrorr)backendcoerceonlyr;r,r,r-r s    r cCsLz |jdWSty$i|_Ynty4Yn0t|}||jd<|S)a A context manager that allows one to skip a given backend from processing entirely. This allows one to use another backend's code in a library that is also a consumer of the same backend. Parameters ---------- backend The backend to skip. See Also -------- set_backend: A context manager that allows setting of backends. set_global_backend: Set a single, global backend for a domain. skip)rOr#rPr)rQr;r,r,r-r s     r cCs~t|}i}g}t}|jD]L\}}|jtjjurB|j||<|jtjj tjj fvrd| |j| |q"|t ||fSr5)inspect signaturerN parametersitemsrG ParameteremptykindPOSITIONAL_ONLYPOSITIONAL_OR_KEYWORDappendaddtuple)fsigrKrLrMkvr,r,r-rH2s    rH)try_lastcCst||||dS)ae This utility method replaces the default backend for permanent use. It will be tried in the list of backends automatically, unless the ``only`` flag is set on a backend. This will be the first tried backend outside the :obj:`set_backend` context manager. Note that this method is not thread-safe. .. warning:: We caution library authors against using this function in their code. We do *not* support this use-case. This function is meant to be used only by users themselves, or by a reference implementation, if one exists. Parameters ---------- backend The backend to register. coerce : bool Whether to coerce input types when trying this backend. only : bool If ``True``, no more backends will be tried if this fails. Implied by ``coerce=True``. try_last : bool If ``True``, the global backend is tried after registered backends. See Also -------- set_backend: A context manager that allows setting of backends. skip_backend: A context manager that allows skipping of backends. N)rr )rQrRrSrer,r,r-r Ds r cCst|dS)a0 This utility method sets registers backend for permanent use. It will be tried in the list of backends automatically, unless the ``only`` flag is set on a backend. Note that this method is not thread-safe. Parameters ---------- backend The backend to register. N)rr )rQr,r,r-r gs r TcCst|||dS)al This utility method clears registered backends. .. warning:: We caution library authors against using this function in their code. We do *not* support this use-case. This function is meant to be used only by users themselves. .. warning:: Do NOT use this method inside a multimethod call, or the program is likely to crash. Parameters ---------- domain : Optional[str] The domain for which to de-register backends. ``None`` means de-register for all domains. registered : bool Whether or not to clear registered backends. See :obj:`register_backend`. globals : bool Whether or not to clear global backends. See :obj:`set_global_backend`. See Also -------- register_backend : Register a backend globally. set_global_backend : Set a global backend. N)rr)rFZ registeredglobalsr,r,r-rwsrc@s.eZdZdZd ddZddZddZeZd S) ra A utility class which marks an argument with a specific dispatch type. Attributes ---------- value The value of the Dispatchable. type The type of the Dispatchable. Examples -------- >>> x = Dispatchable(1, str) >>> x , value=1> See Also -------- all_of_type Marks all unmarked parameters of a function. mark_as Allows one to create a utility function to mark as a given type. TcCs||_||_||_dSr5)valuetype coercible)selfrg dispatch_typerir,r,r-__init__szDispatchable.__init__cCs|j|jf|Sr5)rhrg)rjindexr,r,r- __getitem__szDispatchable.__getitem__cCsdt|j|j|jS)Nz<{}: type={!r}, value={!r}>)formatrh__name__rg)rjr,r,r-__str__szDispatchable.__str__N)T)rpr/r0__doc__rlrnrq__repr__r,r,r,r-rs  rcCstjt|dS)z Creates a utility function to mark something as a specific type. Examples -------- >>> mark_int = mark_as(int) >>> mark_int(1) , value=1> rk)rIpartialrrtr,r,r-rs rcsfdd}|S)a Marks all unmarked arguments as a given type. Examples -------- >>> @all_of_type(str) ... def f(a, b): ... return a, Dispatchable(b, int) >>> f('a', 1) (, value='a'>, , value=1>) cstfdd}|S)Ncs$|i|}tfdd|DS)Nc3s&|]}t|tst|n|VqdSr5 isinstancer).0argarg_typer,r- s z.outer..inner..)r`)rArBZextracted_args)r{r)r,r-inners z)all_of_type..outer..innerrIwraps)r)r}rz)r)r-outers zall_of_type..outerr,)r{rr,rzr-rs rcstfdd}|S) Wraps a ``__ua_convert__`` defined for a single element to all elements. If any of them return ``NotImplemented``, the operation is assumed to be undefined. Accepts a signature of (value, type, coerce). csBg}|D]4}|j|j|o|j}|tur2tS||q|Sr5rgrhriNotImplementedr^) dispatchablesrR converteddcconvert_singler,r-__ua_convert__s z-wrap_single_convertor..__ua_convert__r~rrr,rr-rs  rcstfdd}|S)rcsDg}|D]6}||j|j|o |j}|tur4tS||q|Sr5r)rjrrRrrrrr,r-rs z6wrap_single_convertor_instance..__ua_convert__r~rr,rr-rs  r)rSrRcCs*t|||f}t|||}t|||dS)a Set the backend to the first active backend that supports ``value`` This is useful for functions that call multimethods without any dispatchable arguments. You can use :func:`determine_backend` to ensure the same backend is used everywhere in a block of multimethod calls. Parameters ---------- value The value being tested dispatch_type The dispatch type associated with ``value``, aka ":ref:`marking `". domain: string The domain to query for backends and set. coerce: bool Whether or not to allow coercion to the backend's types. Implies ``only``. only: bool Whether or not this should be the last backend to try. See Also -------- set_backend: For when you know which backend to set Notes ----- Support is determined by the ``__ua_convert__`` protocol. Backends not supporting the type must return ``NotImplemented`` from their ``__ua_convert__`` if they don't support input of that type. Examples -------- Suppose we have two backends ``BackendA`` and ``BackendB`` each supporting different types, ``TypeA`` and ``TypeB``. Neither supporting the other type: >>> with ua.set_backend(ex.BackendA): ... ex.call_multimethod(ex.TypeB(), ex.TypeB()) Traceback (most recent call last): ... uarray.BackendNotImplementedError: ... Now consider a multimethod that creates a new object of ``TypeA``, or ``TypeB`` depending on the active backend. >>> with ua.set_backend(ex.BackendA), ua.set_backend(ex.BackendB): ... res = ex.creation_multimethod() ... ex.call_multimethod(res, ex.TypeA()) Traceback (most recent call last): ... uarray.BackendNotImplementedError: ... ``res`` is an object of ``TypeB`` because ``BackendB`` is set in the innermost with statement. So, ``call_multimethod`` fails since the types don't match. Instead, we need to first find a backend suitable for all of our objects. >>> with ua.set_backend(ex.BackendA), ua.set_backend(ex.BackendB): ... x = ex.TypeA() ... with ua.determine_backend(x, "mark", domain="ua_examples"): ... res = ex.creation_multimethod() ... ex.call_multimethod(res, x) TypeA rRrS)rrr r )rgrkrFrSrRrrQr,r,r-r sDr c sd|vr*|dtfdd|D}n"t|}tdd|DsLtdt|dkrftd|t|||}t|||dS) a Set a backend supporting all ``dispatchables`` This is useful for functions that call multimethods without any dispatchable arguments. You can use :func:`determine_backend_multi` to ensure the same backend is used everywhere in a block of multimethod calls involving multiple arrays. Parameters ---------- dispatchables: Sequence[Union[uarray.Dispatchable, Any]] The dispatchables that must be supported domain: string The domain to query for backends and set. coerce: bool Whether or not to allow coercion to the backend's types. Implies ``only``. only: bool Whether or not this should be the last backend to try. dispatch_type: Optional[Any] The default dispatch type associated with ``dispatchables``, aka ":ref:`marking `". See Also -------- determine_backend: For a single dispatch value set_backend: For when you know which backend to set Notes ----- Support is determined by the ``__ua_convert__`` protocol. Backends not supporting the type must return ``NotImplemented`` from their ``__ua_convert__`` if they don't support input of that type. Examples -------- :func:`determine_backend` allows the backend to be set from a single object. :func:`determine_backend_multi` allows multiple objects to be checked simultaneously for support in the backend. Suppose we have a ``BackendAB`` which supports ``TypeA`` and ``TypeB`` in the same call, and a ``BackendBC`` that doesn't support ``TypeA``. >>> with ua.set_backend(ex.BackendAB), ua.set_backend(ex.BackendBC): ... a, b = ex.TypeA(), ex.TypeB() ... with ua.determine_backend_multi( ... [ua.Dispatchable(a, "mark"), ua.Dispatchable(b, "mark")], ... domain="ua_examples" ... ): ... res = ex.creation_multimethod() ... ex.call_multimethod(res, a, b) TypeA This won't call ``BackendBC`` because it doesn't support ``TypeA``. We can also use leave out the ``ua.Dispatchable`` if we specify the default ``dispatch_type`` for the ``dispatchables`` argument. >>> with ua.set_backend(ex.BackendAB), ua.set_backend(ex.BackendBC): ... a, b = ex.TypeA(), ex.TypeB() ... with ua.determine_backend_multi( ... [a, b], dispatch_type="mark", domain="ua_examples" ... ): ... res = ex.creation_multimethod() ... ex.call_multimethod(res, a, b) TypeA rkc3s&|]}t|tr|nt|VqdSr5rvrxrZ disp_typer,r-r|sz*determine_backend_multi..css|]}t|tVqdSr5rvrr,r,r-r|z6dispatchables must be instances of uarray.Dispatchablerz'Received unexpected keyword arguments: r)popr`all TypeErrorlenrr r )rrFrSrRrBrQr,rr-rhsF    r)N)FF)FF)TF).typingr rUrIrcopyregr$ contextlibrrrrr__all__CallableTupleZArgumentExtractorTypeDictZArgumentReplacerTyper.r4r9r<r=rcontextmanagerrrrstrOptionalrr r rHr r rrrrrrr rr,r,r,r-sb        K # , K