code: def get_label(self, label, lineno):
          
          global NAMESPACE
  
          ex_label, namespace = Memory.id_name(label)
  
          for i in range(len(self.local_labels) - 1, -1, -1):  # Downstep
              result = self.local_labels[i].get(ex_label, None)
              if result is not None:
                  return result
  
          result = Label(ex_label, lineno, namespace=namespace)
          self.local_labels[-1][ex_label] = result  # HINT: no namespace
  
          return result
docs: Returns a label in the current context or in the global one.
          If the label does not exists, creates a new one and returns it.