code: def __new__(cls, n):
      if n < 3:
          raise ValueError("n cannot be less than 3")
      return Standard_Cartan.__new__(cls, "D", n)
  
file_path: sympy/sympy/liealgebras/type_d.py
imports: from .cartan_type import Standard_Cartan
  from sympy.core.backend import eye
label_desc: Use image node_id 1 for calling the TypeD obj's underlying member method code with example usage: obj.__new__(cls, n) and returns: Standard_Cartan