def PSRK_groups(self):
        r'''Dictionary of PSRK subgroup: count groups for the PSRK subgroups,
        as determined by `DDBST's online service <http://www.ddbst.com/unifacga.html>`_.

        Examples
        --------
        >>> pprint(Chemical('Cumene').PSRK_groups)
        {1: 2, 9: 5, 13: 1}
        '''
        if self.__PSRK_groups:
            return self.__PSRK_groups
        else:
            load_group_assignments_DDBST()
            if self.InChI_Key in DDBST_PSRK_assignments:
                self.__PSRK_groups = DDBST_PSRK_assignments[self.InChI_Key]
                return self.__PSRK_groups
            else:
                return None
def PSRK_groups(self):
        r
        if self.__PSRK_groups:
            return self.__PSRK_groups
        else:
            load_group_assignments_DDBST()
            if self.InChI_Key in DDBST_PSRK_assignments:
                self.__PSRK_groups = DDBST_PSRK_assignments[self.InChI_Key]
                return self.__PSRK_groups
            else:
                return None
def PSRK_groups ( self ) : if self . __PSRK_groups : return self . __PSRK_groups else : load_group_assignments_DDBST ( ) if self . InChI_Key in DDBST_PSRK_assignments : self . __PSRK_groups = DDBST_PSRK_assignments [ self . InChI_Key ] return self . __PSRK_groups else : return None
r'''Dictionary of PSRK subgroup: count groups for the PSRK subgroups,
        as determined by `DDBST's online service <http://www.ddbst.com/unifacga.html>`_.

        Examples
        --------
        >>> pprint(Chemical('Cumene').PSRK_groups)
        {1: 2, 9: 5, 13: 1}
r Dictionary of PSRK subgroup : count groups for the PSRK subgroups as determined by DDBST s online service <http : // www . ddbst . com / unifacga . html > _ .