OEGetDistance2

OEGetDistance2(arg1: Union[OEGraphMol,OEMol,OEQMol], a: OEAtomBase,
               b: OEAtomBase) -> float
OEGetDistance2(conf: OEConfBase, a: OEAtomBase, b: OEAtomBase) -> float
OEGetDistance2(ma: Union[OEGraphMol,OEMol,OEQMol], a: OEAtomBase,
               mb: Union[OEGraphMol,OEMol,OEQMol], b: OEAtomBase) -> float
OEGetDistance2(ca: OEConfBase, a: OEAtomBase, cb: OEConfBase,
               b: OEAtomBase) -> float

These four functions are almost identical to the OEGetDistance function. However, they return the square of the distance between two atoms rather than distance. When it is possible to use the square of the distance, this is more efficient.