incremental testing in all()

[perfringo]

Everyone has access not only 'equivalent' but also 'exact' code.

Go to https://github.com/python/cpython/blob/m...inmodule.c and look for builtin_all. For your convenience it's provided below (I am not C-man myself so I have no idea what does it mean ):

static PyObject *
builtin_all(PyObject *module, PyObject *iterable)
/*[clinic end generated code: output=ca2a7127276f79b3 input=1a7c5d1bc3438a21]*/
{
    PyObject *it, *item;
    PyObject *(*iternext)(PyObject *);
    int cmp;

    it = PyObject_GetIter(iterable);
    if (it == NULL)
        return NULL;
    iternext = *Py_TYPE(it)->tp_iternext;

    for (;;) {
        item = iternext(it);
        if (item == NULL)
            break;
        cmp = PyObject_IsTrue(item);
        Py_DECREF(item);
        if (cmp < 0) {
            Py_DECREF(it);
            return NULL;
        }
        if (cmp == 0) {
            Py_DECREF(it);
            Py_RETURN_FALSE;
        }
    }
    Py_DECREF(it);
    if (PyErr_Occurred()) {
        if (PyErr_ExceptionMatches(PyExc_StopIteration))
            PyErr_Clear();
        else
            return NULL;
    }
    Py_RETURN_TRUE;
}