def process(self, bond_dist):
    (key, value) = bond_dist
    print(f'BondDistToString: key {key} value {value}')
    (yield f'{key[0]}.{key[1]}.{key[2]}.{key[3]}.{value}')
def process(self, bond_dist):
    (key, value) = bond_dist
    print(f'BondDistToString: key {key} value {value}')
    (yield f'{key[0]}.{key[1]}.{key[2]}.{key[3]}.{value}')