@dispatch(mean)
def _split_agg(expr, leaf=None, agg=None):
    total = agg.total.sum(axis=expr.axis, keepdims=expr.keepdims)
    count = agg['count'].sum(axis=expr.axis, keepdims=expr.keepdims)

    return count / total
dataset/ETHPy150Open blaze/blaze/blaze/expr/split.py/_split_agg/swapped operands of `/`