code: def get_total_per_atom_sasa(self):
  		
  		total_sasa = defaultdict(int)
  		for traj in range(len(self.atom_sasa)):
  			for atom in self.atom_sasa[traj]:
  				total_sasa[atom]+=float(sum((self.atom_sasa[traj][atom])))/len(self.atom_sasa[traj][atom])
  		for atom in total_sasa:
  			total_sasa[atom]=float(total_sasa[atom])/len(self.atom_sasa)
  		return total_sasa
docs: Return average SASA of the atoms.