class_docstr: This class provides a very high level route plan.
class_docstr_tok: ["This","class","provides","a","very","high","level","route","plan","."]
docstr: Distance heuristic calculator for path searching
  in self._graph
docstr_tok: ["Distance","heuristic","calculator","for","path","searching","in","self._graph"]
code: def _distance_heuristic(self, n1, n2):
      """
      Distance heuristic calculator for path searching
      in self._graph
      """
      l1 = np.array(self._graph.nodes[n1]["vertex"])
      l2 = np.array(self._graph.nodes[n2]["vertex"])
      return np.linalg.norm(l1 - l2)
  
file_path: carla/PythonAPI/carla/agents/navigation/global_route_planner.py
imports: import math
  import numpy
  import networkx
  import carla
  from agents.navigation.local_planner import RoadOption
  from agents.tools.misc import vector
label_desc: Use image node_id 8 for calling the GlobalRoutePlanner obj's underlying member method code with example usage: obj._distance_heuristic(n1, n2) and returns: np