Travis Oliphant wrote:
>Andrew MacKeith wrote:
>
>
>
>>I would like to use the built-in array_repr in numpy, because
>>I need a fast repr that does not contain new line characters.
>>I see no way of doing this without editing the code in numeric.py,
>>and I hate to edit other people's libraries.
>>
>>
>>
>>from numpy import array
>
>
>>causes numeric.py to be executed, which includes a call to
>>multiarray.set_string_function(array_repr, 1)
>>
>>If I want to "undo" this, there is no way of doing it.
>>
>>
>>
>>
>Why do want to "undo" this?
>
>
>
>>I would like to unset the repr with:
>>numpy.set_string_function(None, 1)
>>
>>
>>
>>
>I don't understand what you are trying to do. Why don't you just set
>the string function to an actual callable.
>
Since arrayobject.c contains a fast repr function, I would like to use
that. Why reinvent the wheel.
>What edits do you propose to
>make?
>
>
If you mean how would I propose to change the code, I would have
array_set_string_function recognise None as an acceptable argument
and PyArray_SetStringFunction would recognise this to set
PyArray_ReprFunction = array_repr;
These is the (untested) code.
multiarraymodule.c:
static PyObject *
array_set_string_function(PyObject *dummy, PyObject *args, PyObject *kwds)
{
PyObject *op;
int repr=1;
static char *kwlist[] = {"f", "repr", NULL};
if(!PyArg_ParseTupleAndKeywords(args, kwds, "O|i", kwlist,
&op, &repr)) return NULL;
if (!PyCallable_Check(op) and op != Py_None) {
PyErr_SetString(PyExc_TypeError,
"Argument must be callable.");
return NULL;
}
PyArray_SetStringFunction(op, repr);
Py_INCREF(Py_None);
return Py_None;
}
arrayobject.c:
static void
PyArray_SetStringFunction(PyObject *op, int repr)
{
if (repr) {
/* Dispose of previous callback */
Py_XDECREF(PyArray_ReprFunction);
if (op == Py_None)
{
PyArray_ReprFunction = array_repr;
}
else
{
/* Add a reference to new callback */
Py_XINCREF(op);
/* Remember new callback */
PyArray_ReprFunction = op;
}
} else {
/* Dispose of previous callback */
Py_XDECREF(PyArray_StrFunction);
if (op == Py_None)
{
PyArray_StrFunction = array_str;
}
else
{
/* Add a reference to new callback */
Py_XINCREF(op);
/* Remember new callback */
PyArray_StrFunction = op;
}
}
}
>-Travis
>
>
>
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