class_docstr: The base class for a math engine that does calculations.
      
code: def __init__(self, internal):
      if not isinstance(internal, PythonWrapper.MathEngine):
          raise ValueError(
              "The `internal` must be PythonWrapper.MathEngine"
          )
  
      self._internal = internal
  
file_path: neoml/NeoML/Python/neoml/MathEngine.py
imports: import neoml.PythonWrapper
label_desc: Use image node_id 1 to create a new MathEngine object  with example: obj = MathEngine(internal)