code: def from_dict(cls, d):
          
          sites = [Site.from_dict(sd) for sd in d["sites"]]
          charge = d.get("charge", 0)
          spin_multiplicity = d.get("spin_multiplicity")
          return cls.from_sites(sites, charge=charge, spin_multiplicity=spin_multiplicity)
docs: Reconstitute a Molecule object from a dict representation created using
          as_dict().
  
          Args:
              d (dict): dict representation of Molecule.
  
          Returns:
              Molecule object