code: def _is_valid_cut(
      fragments,
      num_cuts,
      max_frag_degree,
      num_fragments_requested,
      cut_candidates,
      max_free_wires,
  ):
      """Helper function for determining if a cut is a valid canditate."""
      # pylint: disable=too-many-arguments
  
      k = len(fragments)
      key = (k, max_frag_degree)
  
      correct_num_fragments = k <= num_fragments_requested
      best_candidate_yet = (key not in cut_candidates) or (
          len(cut_candidates[key]) > num_cuts
      )
      # pylint: disable=no-member
      all_fragments_fit = all(
          len(qml.qcut.graph_to_tape(f).wires) <= max_free_wires
          for j, f in enumerate(fragments)
      )
  
      return (
          correct_num_fragments
          and best_candidate_yet
          and all_fragments_fit
      )
  
imports: import uuid
  from typing import Any, Callable, Sequence, Tuple
  import warnings
  import numpy
  from networkx import MultiDiGraph, has_path, weakly_connected_components
  import pennylane
  from pennylane.measurements import MeasurementProcess
  from pennylane.ops.meta import WireCut
  from pennylane.queuing import WrappedObj
  from pennylane.operation import Operation
  from .kahypar import kahypar_cut
  from .cutstrategy import CutStrategy
label_desc: Use image node_id 13 for calling a global function with example usage: _is_valid_cut(fragments, num_cuts, max_frag_degree, num_fragments_requested, cut_candidates, max_free_wires) and returns: unknown