code: def update_role(u_name, newprivilege):
          '''
          Update the role of the usr.
          '''
          entry = TabMember.update(
              role=newprivilege
          ).where(TabMember.user_name == u_name)
          try:
              entry.execute()
              return True
          except:
              return Falsf update_role(u_name, newprivilege):
          '''
          Update the role of the usr.
          '''
          entry = TabMember.update(
              role=newprivilege
          ).where(TabMember.user_name == u_name)
          try:
              entry.execute()
              return True
          except:
              return False
docs: Update the role of the usr.