code: def __new__(cls, n):
      if n != 4:
          raise ValueError("n should be 4")
      return Standard_Cartan.__new__(cls, "F", 4)
  
file_path: sympy/sympy/liealgebras/type_f.py
imports: from .cartan_type import Standard_Cartan
  from sympy.core.backend import Matrix, Rational
label_desc: Use image node_id 1 for calling the TypeF obj's underlying member method code with example usage: obj.__new__(cls, n) and returns: Standard_Cartan