class_docstr: Base class for mean functions
class_docstr_tok: ["Base","class","for","mean","functions"]
docstr: Evaluate the mean function.
  
  Parameters
  ----------
  X: The training inputs to the mean function.
docstr_tok: ["Evaluate","the","mean","function",".","Parameters","--","--","--","--","--","X",":","The","training","inputs","to","the","mean","function","."]
code: def __call__(self, X):
      R"""
      Evaluate the mean function.
  
      Parameters
      ----------
      X: The training inputs to the mean function.
      """
      raise NotImplementedError
  
imports: import pytensor.tensor
label_desc: Use image node_id 1 for calling the Mean obj's underlying member method code with example usage: obj.__call__(X) without return types