MDAnalysis.analysis.hbonds module is used to analyse hydrogen bonds formed between protein
        and ligand for each submitted trajectory. The hydrogen bonds are then counted by total value
        per frame (count_by_time), as well as obtaining the frequency of each individual hydrogen
        bond (count_by_type). This function is used in case no trajectory has been submitted for analysis.

        Takes:
            * distance * - distance between hydrogen bond donor and acceptor in angstroms
        Output:
            * self.hbonds * - array with information about all detected hydrogen bonds
            * self.hbonds_by_time * - total hbond number by frame
            * self.hbonds_by_type * - frequency of each hydrogen bond

def analyse_hydrogen_bonds_topology(self,distance=3):
        """
        MDAnalysis.analysis.hbonds module is used to analyse hydrogen bonds formed between protein
        and ligand for each submitted trajectory. The hydrogen bonds are then counted by total value
        per frame (count_by_time), as well as obtaining the frequency of each individual hydrogen
        bond (count_by_type). This function is used in case no trajectory has been submitted for analysis.

        Takes:
            * distance * - distance between hydrogen bond donor and acceptor in angstroms
        Output:
            * self.hbonds * - array with information about all detected hydrogen bonds
            * self.hbonds_by_time * - total hbond number by frame
            * self.hbonds_by_type * - frequency of each hydrogen bond
        """
        h = MDAnalysis.analysis.hbonds.HydrogenBondAnalysis(self.topology_data.universe,'(segid '+str(self.topology_data.universe.ligand.segids[0])+' and resid '+str(self.topology_data.universe.ligand.resids[0])+')',"protein",distance=3,acceptors=self.acceptors,donors=self.donors)
        h.run()
        h.generate_table()
        self.hbonds[0]=h.table
        self.hbonds_by_time[0] = h.count_by_time()
        self.hbonds_by_type[0] = h.count_by_type()