code: def addreadergroup(self, newgroup):
          
  
          hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
          if 0 != hresult:
              raise error(
                  'Failed to establish context: ' + \
                  SCardGetErrorMessage(hresult))
          try:
              hresult = SCardIntroduceReaderGroup(hcontext, newgroup)
              if 0 != hresult:
                  raise error(
                      'Unable to introduce reader group: ' + \
                      SCardGetErrorMessage(hresult))
              else:
                  innerreadergroups.addreadergroup(self, newgroup)
  
          finally:
              hresult = SCardReleaseContext(hcontext)
              if 0 != hresult:
                  raise error(
                      'Failed to release context: ' + \
                      SCardGetErrorMessage(hresult))
docs: Add a reader group