Binary operate

ceval.c

PyObject *
binary_operate(PyObject * left, PyObject * right, char operator) {
    switch (operator) {
        case '+':
            return PyNumber_Add(left, right);
        case '-':
            return PyNumber_Subtract(left, right);
        case '*':
            return PyNumber_Multiply(left, right);
        case '/':
            return PyNumber_FloorDivide(left, right);
        case '^':
            return PyNumber_Power(left, right, Py_None);
        default:
            return NULL;
    }
}