code: def dynkin_diagram(self):
      n = self.n
      diag = "---".join("0" for i in range(1, n)) + "=>=0\n"
      diag += "   ".join(str(i) for i in range(1, n + 1))
      return diag
  
file_path: sympy/sympy/liealgebras/type_b.py
imports: from .cartan_type import Standard_Cartan
  from sympy.core.backend import eye
label_desc: Use image node_id 10 for calling the TypeB obj's underlying member method code with example usage: obj.dynkin_diagram() and returns: diag