g0dZddlmZddlZddlZddlZddlmZddlm Z ddl m Z ddl m Z ddlmZdd lmZejeZGd d eZGd d e ZdS)z:VF2Layout pass to find a layout using subgraph isomorphism)EnumN) vf2_mapping)Layout) AnalysisPass)TranspilerError) vf2_utils) deprecate_argceZdZdZdZdZdZdS)VF2LayoutStopReasonz Stop reasons for VF2Layout pass.zsolution foundznonexistent solutionz>2q gates in basisN)__name__ __module__ __qualname____doc__SOLUTION_FOUNDNO_SOLUTION_FOUND MORE_THAN_2Q`/granary/edev/quantum/lib/python3.11/site-packages/qiskit/transpiler/passes/layout/vf2_layout.pyr r s$**%N.'LLLrr cfeZdZdZeddddd d fd Zd ZxZS) VF2LayoutadA pass for choosing a Layout of a circuit onto a Coupling graph, as a subgraph isomorphism problem, solved by VF2++. If a solution is found that means there is a "perfect layout" and that no further swap mapping or routing is needed. If a solution is found the layout will be set in the property set as ``property_set['layout']``. However, if no solution is found, no ``property_set['layout']`` is set. The stopping reason is set in ``property_set['VF2Layout_stop_reason']`` in all the cases and will be one of the values enumerated in ``VF2LayoutStopReason`` which has the following values: * ``"solution found"``: If a perfect layout was found. * ``"nonexistent solution"``: If no perfect layout was found. * ``">2q gates in basis"``: If VF2Layout can't work with basis By default, this pass will construct a heuristic scoring map based on the error rates in the provided ``target`` (or ``properties`` if ``target`` is not provided). However, analysis passes can be run prior to this pass and set ``vf2_avg_error_map`` in the property set with a :class:`~.ErrorMap` instance. If a value is ``NaN`` that is treated as an ideal edge For example if an error map is created as:: from qiskit.transpiler.passes.layout.vf2_utils import ErrorMap error_map = ErrorMap(3) error_map.add_error((0, 0), 0.0024) error_map.add_error((0, 1), 0.01) error_map.add_error((1, 1), 0.0032) that represents the error map for a 2 qubit target, where the avg 1q error rate is ``0.0024`` on qubit 0 and ``0.0032`` on qubit 1. Then the avg 2q error rate for gates that operate on (0, 1) is 0.01 and (1, 0) is not supported by the target. This will be used for scoring if it's set as the ``vf2_avg_error_map`` key in the property set when :class:`~.VF2Layout` is run. propertiesz1.4Qiskitz in Qiskit 2.0aThe BackendProperties data structure has been deprecated and will be removed in Qiskit 2.0. The `target` input argument should be used instead. You can use Target.from_configuration() to build the target from the properties object, but in 2.0 you will need to generate a target directly.)namesince package_nameremoval_timelineadditional_msgNFc t||_|#|jx} | |_n||_||_||_||_||_||_ ||_ d|_ dS)aInitialize a ``VF2Layout`` pass instance Args: coupling_map (CouplingMap): Directed graph representing a coupling map. strict_direction (bool): If True, considers the direction of the coupling map. Default is False. seed (int): Sets the seed of the PRNG. -1 Means no node shuffling. call_limit (int): The number of state visits to attempt in each execution of VF2. time_limit (float): The total time limit in seconds to run ``VF2Layout`` properties (BackendProperties): The backend properties for the backend. If :meth:`~qiskit.providers.models.BackendProperties.readout_error` is available it is used to score the layout. max_trials (int): The maximum number of trials to run VF2 to find a layout. If this is not specified the number of trials will be limited based on the number of edges in the interaction graph or the coupling graph (whichever is larger) if no other limits are set. If set to a value <= 0 no limit on the number of trials will be set. target (Target): A target representing the backend device to run ``VF2Layout`` on. If specified it will supersede a set value for ``properties`` and ``coupling_map`` if the :class:`.Target` contains connectivity constraints. If the value of ``target`` models an ideal backend without any constraints then the value of ``coupling_map`` will be used. Raises: TypeError: At runtime, if neither ``coupling_map`` or ``target`` are provided. N) super__init__targetbuild_coupling_map coupling_maprstrict_directionseed call_limit time_limit max_trials avg_error_map) selfr$r%r&r'r(rr)r"target_coupling_map __class__s rr!zVF2Layout.__init__Msb   (, (F(F(H(HH$U 3D   ,D $ 0 $$$!rc t |jtd|jd|_|j*t j|j|j|j|_t j||j }|tj |jd<dS|\}}}t j |}t j ||}t j|j|j|j \}|j|jjt#t$j|jj} t#t+t-| } | r!|fd| D|jr|jk|jdt-|} t-|jj} t=| | dz|_t> dtC||dd d |j } d}d}tEj"}d }fd }| D]}|d z }t> d|tj#}fd|$D}t-|t-|kr||}n:|j||}n%t j%|j||||j ||}|dkr ||}nt> d|||||}|}n3||kr-||}t> d|||||}|}|j9|jd kr.||jkr#t> d||jnMtEj"|z }|j.||jkr#t> d||jn| tj&}nt j'|||(|j}|tj&|jd<dS||jd<|j)*D]"}|jd+|#||jd<dS)zrun the layout methodNz)coupling_map or target must be specified.vf2_avg_error_mapVF2Layout_stop_reasonc g|] }| Srr).0icm_nodess r z!VF2Layout.run..s+K+K+KAHQK+K+K+KrzRunning VF2 to find mappingsTF)subgraphid_orderinducedr'rc^tfd|DS)Nc(i|]\}}||Srr)r2kvreverse_im_graph_node_maps r z.mapping_to_layout..s%^^^tq!4Q7^^^r)ritems)layout_mappingr>s rmapping_to_layoutz(VF2Layout.run..mapping_to_layouts2^^^^~G[G[G]G]^^^__ _rzRunning trial: %sc(i|]\}}||Srr)r2cm_iim_ir4s rr?z!VF2Layout.run..s#UUUztTdHTNUUUr) edge_listbit_listgzTrial %s has score %szAFound layout %s has a lower score (%s) than previous best %s (%s)z'Trial %s is >= configured max trials %szs @@rrunz VF2Layout.runs"   $!"MNN N!./BC   %!*!B T_d.?""D 238MNN >9L9YD 5 6 FMSJ#%> %5h??$3H>OPP&=  ty$*?  ( ; "t{'8'D !>!>t{?P!Q!QRRNE#h--0011<<^LLI M**+K+K+K+K+K+K+KLLL ? "t'>4?CZ"%h&8&8&:&:";"; "%d&7&=&G&G&I&I"J"J !"57JKKbPDO 3444       "Y[[  ` ` ` ` ` : : G aKF LL,f 5 5 5-:: W !' !' &2#*t/B/BvQUQ`G`G` FPTP_```9;;3L*|t/N/N R O   -?KK%5""$$)" M$=P=b!"9:*7D h 'y'')) > >!(+88====5@1222r)NFNNNNNN)r r rrr r!rz __classcell__)r-s@rrr(s""H] (J    6"6"6"6"6"  6"pCACACACACACACArr)renumrrRloggingr] rustworkxrqiskit.transpiler.layoutrqiskit.transpiler.basepassesrqiskit.transpiler.exceptionsrqiskit.transpiler.passes.layoutr qiskit.utilsr getLoggerr r[r rrrrrs.A@ !!!!!!++++++555555888888555555&&&&&&  8 $ $((((($(((jAjAjAjAjA jAjAjAjAjAr