def _init(self, symmetry=True, potential=None):
    ' The initialization of the additional (not-in-ASE) properties. To be used\n       by constructor and by promote_ase_atoms'
    self._unique_sites = None
    self._potential = potential
    self._symmetry = symmetry
The initialization of the additional (not-in-ASE) properties. To be used
by constructor and by promote_ase_atoms
def _init(self, symmetry=True, potential=None):
    ' The initialization of the additional (not-in-ASE) properties. To be used\n       by constructor and by promote_ase_atoms'
    self._unique_sites = None
    self._potential = potential
    self._symmetry = symmetry