code: def get(self, name, default=None):
          
          if self.vars is None:
              return default
          return self.vars.get(name, default)
docs: Returns the value of the given variable, or the given default
          value if the variable is not defined.
  
          :type  name: string
          :param name: The name of the variable.
          :type  default: object
          :param default: The default value.
          :rtype:  object
          :return: The value of the variable.