class_docstr: Base class for vertices.
  
  **Attributes**
      e (list[Edge]): list of edges associated with this vertex.
docstr: e_out(): list of edges directed outward this vertex.
code: def e_out(self):
      """
      e_out(): list of edges directed outward this vertex.
      """
      return list(filter((lambda e: e.v[0] == self), self.e))
  
file_path: pygraphistry/graphistry/layout/graph/vertexBase.py
label_desc: Use image node_id 4 for calling the VertexBase obj's underlying member method code with example usage: obj.e_out() and returns: list