code: def get_role(self, role):
          
          uri = "OS-KSADM/roles/%s" % utils.get_id(role)
          resp, resp_body = self.method_get(uri)
          role = Role(self, resp_body.get("role"))
          return role
docs: Returns a Role object representing the specified parameter. The 'role'
          parameter can be either an existing Role object, or the ID of the role.
  
          If an invalid role is passed, a NotFound exception is raised.