class_docstr: Concrete base class for Cartan types such as A4, etc
code: def __new__(cls, series, n):
      obj = Basic.__new__(cls)
      obj.n = n
      obj.series = series
      return obj
  
file_path: sympy/sympy/liealgebras/cartan_type.py
imports: from sympy.core import Atom, Basic
label_desc: Use image node_id 1 for calling the Standard_Cartan obj's underlying member method code with example usage: obj.__new__(cls, series, n) and returns: obj