code: def addtoreadergroup(self, groupname):
          
  
          hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
          if 0 != hresult:
              raise EstablishContextException(hresult)
          try:
              hresult = SCardIntroduceReader(hcontext, self.name, self.name)
              if 0 != hresult and SCARD_E_DUPLICATE_READER != hresult:
                  raise IntroduceReaderException(hresult, self.name)
              hresult = SCardAddReaderToGroup(hcontext, self.name, groupname)
              if 0 != hresult:
                  raise AddReaderToGroupException(hresult, self.name, groupname)
          finally:
              hresult = SCardReleaseContext(hcontext)
              if 0 != hresult:
                  raise ReleaseContextException(hresult)
docs: Add reader to a reader group.