def _sympifyit(arg, retval=None):
    def deco(func):
        return __sympifyit(func, arg, retval)

    return deco
Note that this index is 1-based and RDKit's internal index in 0-based. Changed to be compatible with OpenBabel
dataset/ETHPy150Open sympy/sympy/sympy/core/decorators.py/_sympifyit--crossover with--dataset/ETHPy150Open oddt/oddt/oddt/toolkits/rdk.py/Atom.idx