class_docstr: Base class for a vertex.
class_docstr_tok: ["Base","class","for","a","vertex","."]
code: def __hash__(self):
      return self.hash
  
imports: import collections
  from abc import ABC, abstractmethod
  import numpy
  from scipy._lib._util import MapWrapper
label_desc: Use image node_id 2 for calling the VertexBase obj's underlying member method code with example usage: obj.__hash__() and returns: self