improve python interface
This commit is contained in:
Vítor Santos Costa
parent
3e696eb831
commit
ea3f2f13e9
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@ -8,82 +8,20 @@
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static atom_t ATOM_true, ATOM_false;
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static foreign_t
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init_python(void)
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{
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Py_Initialize();
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static functor_t FUNCTOR_dollar1,
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FUNCTOR_pointer1,
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FUNCTOR_add2,
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FUNCTOR_sub2,
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FUNCTOR_mul2,
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FUNCTOR_div2,
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FUNCTOR_hat2;
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return TRUE;
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}
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static foreign_t
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end_python(void)
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{
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Py_Finalize();
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return TRUE;
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}
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static int
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python_import(term_t mname, term_t mod)
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{
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char *s;
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size_t len;
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PyObject *pName, *pModule;
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if ( !PL_get_nchars(mname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pName = PyString_FromString(s);
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if (pName == NULL) {
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return FALSE;
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}
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PyRun_SimpleString("import sys");
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PyRun_SimpleString("sys.path.append(\"/Users/vsc/Yap/bins/osx/packages/pyswip\")");
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//PyRun_SimpleString("import multiply");
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pModule = PyImport_Import(pName);
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PyErr_Print();
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Py_DECREF(pName);
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if (pModule == NULL) {
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return FALSE;
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}
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return PL_unify_pointer(mod, (void *)pModule);
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}
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static foreign_t
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python_f(term_t tmod, term_t fname, term_t tf)
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{
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char *s;
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size_t len;
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PyObject *pF, *pModule;
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void **mp = (void *)&pModule;
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if ( !PL_get_pointer(tmod, mp) ) {
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PyObject *pName;
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if ( !PL_get_nchars(fname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pName = PyString_FromString(s);
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if (pName == NULL) {
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return FALSE;
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}
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pModule = PyImport_Import(pName);
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}
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if ( !PL_get_nchars(fname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pF = PyObject_GetAttrString(pModule, s);
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if (pF == NULL || ! PyCallable_Check(pF)) {
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return FALSE;
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}
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return PL_unify_pointer(tf, (void *)pF);
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}
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static PyObject *py_Main;
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static PyObject *
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term_to_python(term_t t)
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{
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// Yap_DebugPlWrite(YAP_GetFromSlot(t)); fprintf(stderr, " here I am\n");
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switch (PL_term_type(t)) {
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case PL_VARIABLE:
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return NULL;
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@ -140,6 +78,102 @@ term_to_python(term_t t)
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return NULL;
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}
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return out;
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} else {
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functor_t fun;
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if (!PL_get_functor(t, &fun))
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return NULL;
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if (fun == FUNCTOR_dollar1) {
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char *s;
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term_t targ = PL_new_term_ref();
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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if (!PL_get_atom_chars(targ, &s))
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return NULL;
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/* return __main__,s */
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return PyObject_GetAttrString(py_Main, s);
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} else if (fun == FUNCTOR_pointer1) {
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void *ptr;
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term_t targ = PL_new_term_ref();
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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if (!PL_get_pointer(targ, &ptr))
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return NULL;
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/* return __main__,s */
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return (PyObject *)ptr;
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} else if (fun == FUNCTOR_add2) {
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term_t targ = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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lhs = term_to_python(targ);
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if (!PyNumber_Check(lhs))
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return NULL;
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if (! PL_get_arg(2, t, targ) )
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return NULL;
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rhs = term_to_python(targ);
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if (!PyNumber_Check(rhs))
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return NULL;
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return PyNumber_Add(lhs, rhs);
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} else if (fun == FUNCTOR_sub2) {
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term_t targ = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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lhs = term_to_python(targ);
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if (!PyNumber_Check(lhs))
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return NULL;
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if (! PL_get_arg(2, t, targ) )
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return NULL;
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rhs = term_to_python(targ);
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if (!PyNumber_Check(rhs))
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return NULL;
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return PyNumber_Subtract(lhs, rhs);
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} else if (fun == FUNCTOR_mul2) {
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term_t targ = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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lhs = term_to_python(targ);
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if (!PyNumber_Check(lhs))
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return NULL;
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if (! PL_get_arg(2, t, targ) )
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return NULL;
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rhs = term_to_python(targ);
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if (!PyNumber_Check(rhs))
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return NULL;
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return PyNumber_Multiply(lhs, rhs);
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} else if (fun == FUNCTOR_div2) {
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term_t targ = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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lhs = term_to_python(targ);
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if (!PyNumber_Check(lhs))
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return NULL;
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if (! PL_get_arg(2, t, targ) )
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return NULL;
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rhs = term_to_python(targ);
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if (!PyNumber_Check(rhs))
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return NULL;
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return PyNumber_Divide(lhs, rhs);
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} else if (fun == FUNCTOR_hat2) {
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term_t targ = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ) )
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return NULL;
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lhs = term_to_python(targ);
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if (! PL_get_arg(2, t, targ) )
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return NULL;
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rhs = term_to_python(targ);
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return PyObject_GetItem(lhs, rhs);
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}
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}
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return NULL;
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}
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@ -147,14 +181,14 @@ term_to_python(term_t t)
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}
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static foreign_t
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output_python_term(PyObject *pVal, term_t t)
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python_to_term(PyObject *pVal, term_t t)
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{
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if (PyLong_Check(pVal)) {
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return PL_unify_int64(t, PyLong_AsLong(pVal));
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} else if (PyInt_Check(pVal)) {
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return PL_unify_int64(t, PyInt_AsLong(pVal));
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} else if (PyBool_Check(pVal)) {
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if (pVal == Py_True) {
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if (PyObject_IsTrue(pVal)) {
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return PL_unify_atom(t, ATOM_true);
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} else {
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return PL_unify_atom(t, ATOM_false);
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@ -164,32 +198,166 @@ output_python_term(PyObject *pVal, term_t t)
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} else if (PyByteArray_Check(pVal)) {
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atom_t tmp_atom = PL_new_atom(PyByteArray_AsString(pVal));
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return PL_unify_atom(t, tmp_atom);
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} else if (PyString_Check(pVal)) {
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atom_t tmp_atom = PL_new_atom(PyString_AsString(pVal));
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return PL_unify_atom(t, tmp_atom);
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} else if (PyList_Check(pVal)) {
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term_t to = PL_new_term_ref();
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Py_ssize_t i, sz = PyList_GET_SIZE(pVal);
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for (i = 0; i < sz; i++) {
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if (!PL_unify_list(t, to, t) ||
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!output_python_term(PyList_GetItem(pVal, i), to))
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!python_to_term(PyList_GetItem(pVal, i), to))
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return FALSE;
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}
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return PL_unify_nil(t);
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} else {
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term_t to = PL_new_term_ref(), t1 = PL_new_term_ref();
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PL_put_pointer(t1, (void *)pVal);
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PL_cons_functor(to, FUNCTOR_pointer1, t1);
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return PL_unify(t, to);
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}
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}
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static int
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python_import(term_t mname, term_t mod)
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{
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char *s;
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size_t len;
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PyObject *pName, *pModule;
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if ( !PL_get_nchars(mname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pName = PyString_FromString(s);
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if (pName == NULL) {
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return FALSE;
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}
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pModule = PyImport_Import(pName);
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// PyErr_Print();
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Py_DECREF(pName);
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if (pModule == NULL) {
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return FALSE;
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}
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return python_to_term(pModule, mod);
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}
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static foreign_t
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python_f(term_t tmod, term_t fname, term_t tf)
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{
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char *s;
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size_t len;
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PyObject *pF, *pModule;
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/* if an atom, fetch again */
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if ( PL_is_atom(tmod) ) {
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PyObject *pName;
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if ( !PL_get_nchars(fname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pName = PyString_FromString(s);
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if (pName == NULL) {
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return FALSE;
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}
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pModule = PyImport_Import(pName);
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} else if (!(pModule = term_to_python(tmod)))
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return FALSE;
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if ( !PL_get_nchars(fname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pF = PyObject_GetAttrString(pModule, s);
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if (pF == NULL || ! PyCallable_Check(pF)) {
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return FALSE;
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}
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return python_to_term(pF, tf);
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}
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static foreign_t
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python_o(term_t tmod, term_t fname, term_t tf)
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{
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char *s;
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size_t len;
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PyObject *pO, *pModule;
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pModule = term_to_python(tmod);
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if ( !PL_get_nchars(fname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
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return FALSE;
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}
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pO = PyObject_GetAttrString(pModule, s);
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if (pO == NULL) {
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return FALSE;
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}
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return python_to_term(pO, tf);
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}
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static foreign_t
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python_set_item(term_t tobj, term_t tpos, term_t titem)
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{
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PyObject *obj, *item, *pos;
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obj = term_to_python(tobj);
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if (obj == NULL)
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return FALSE;
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item = term_to_python(titem);
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if (item == NULL)
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return FALSE;
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pos = term_to_python(tpos);
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if (pos == NULL)
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return FALSE;
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if (PyObject_SetItem(obj, pos, item) < 0)
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return FALSE;
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return TRUE;
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}
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static foreign_t
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python_len(term_t tobj, term_t tf)
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{
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Py_ssize_t len;
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PyObject *o;
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o = term_to_python(tobj);
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if (o == NULL)
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return FALSE;
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len = PyObject_Length(o);
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return PL_unify_int64(tf, len);
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}
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static foreign_t
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python_dir(term_t tobj, term_t tf)
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{
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PyObject *dir;
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PyObject *o;
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o = term_to_python(tobj);
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if (o == NULL)
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return FALSE;
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dir = PyObject_Dir(o);
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return python_to_term(dir, tf);
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}
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static foreign_t
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python_is(term_t tobj, term_t tf)
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{
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PyObject *o;
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o = term_to_python(tobj);
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if (!o)
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return FALSE;
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return python_to_term(o, tf);
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}
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static foreign_t
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python_apply(term_t tin, term_t targs, term_t tf)
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{
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PyObject *pF, *pArgs, *pValue;
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void **mpf = (void *)&pF;
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int i, arity;
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atom_t aname;
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foreign_t out;
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term_t targ = PL_new_term_ref();
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if ( !PL_get_pointer(tin, mpf) ) {
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pF = term_to_python(tin);
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if ( pF == NULL ) {
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return FALSE;
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}
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if (! PL_get_name_arity( targs, &aname, &arity) ) {
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@ -208,11 +376,72 @@ python_apply(term_t tin, term_t targs, term_t tf)
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}
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pValue = PyObject_CallObject(pF, pArgs);
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Py_DECREF(pArgs);
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out = output_python_term(pValue, tf);
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if (pValue == NULL)
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return FALSE;
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out = python_to_term(pValue, tf);
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Py_DECREF(pValue);
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return out;
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}
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static foreign_t
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python_assign(term_t name, term_t exp)
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{
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PyObject *e = term_to_python(exp);
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char *s;
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if (e == NULL)
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return FALSE;
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if (!PL_get_atom_chars(name, &s))
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return FALSE;
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return PyObject_SetAttrString(py_Main, s, e) >= 0;
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}
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static foreign_t
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python_access(term_t obj, term_t f, term_t out)
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{
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PyObject *o = term_to_python(obj), *pValue, *pArgs, *pF;
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atom_t name;
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char *s;
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int i, arity;
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term_t targ = PL_new_term_ref();
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if (o == NULL)
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return FALSE;
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if ( PL_is_atom(f) ) {
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if (!PL_get_atom_chars(f, &s))
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return FALSE;
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if ((pValue = PyObject_GetAttrString(o, s)) == NULL)
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return FALSE;
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return python_to_term(pValue, out);
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}
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if (! PL_get_name_arity( f, &name, &arity) ) {
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return FALSE;
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}
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s = PL_atom_chars(name);
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if ((pF = PyObject_GetAttrString(o, s)) < 0)
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return FALSE;
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pArgs = PyTuple_New(arity);
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for (i = 0 ; i < arity; i++) {
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PyObject *pArg;
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if (! PL_get_arg(i+1, f, targ) )
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return FALSE;
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pArg = term_to_python(targ);
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if (pArg == NULL)
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return FALSE;
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/* pArg reference stolen here: */
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PyTuple_SetItem(pArgs, i, pArg);
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}
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pValue = PyObject_CallObject(pF, pArgs);
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if (pValue == NULL) {
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Py_DECREF(pArgs);
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Py_DECREF(pF);
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return FALSE;
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}
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Py_DECREF(pArgs);
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Py_DECREF(pF);
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return python_to_term(o, out);
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}
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static foreign_t
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python_run_command(term_t cmd)
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{
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@ -227,6 +456,23 @@ python_run_command(term_t cmd)
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return FALSE;
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}
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static foreign_t
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init_python(void)
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{
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Py_Initialize();
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py_Main = PyImport_AddModule("__main__");
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return TRUE;
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}
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static foreign_t
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end_python(void)
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{
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Py_Finalize();
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return TRUE;
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}
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install_t install_python(void);
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install_t
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@ -236,12 +482,26 @@ install_python(void)
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// FUNCTOR_boolop1 = PL_new_functor(PL_new_atom("@"), 1);
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ATOM_true = PL_new_atom("true");
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ATOM_false = PL_new_atom("false");
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FUNCTOR_dollar1 = PL_new_functor(PL_new_atom("$"), 1);
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FUNCTOR_pointer1 = PL_new_functor(PL_new_atom("__obj__"), 1);
|
||||
FUNCTOR_add2 = PL_new_functor(PL_new_atom("+"), 2);
|
||||
FUNCTOR_sub2 = PL_new_functor(PL_new_atom("-"), 2);
|
||||
FUNCTOR_mul2 = PL_new_functor(PL_new_atom("*"), 2);
|
||||
FUNCTOR_div2 = PL_new_functor(PL_new_atom("/"), 2);
|
||||
FUNCTOR_hat2 = PL_new_functor(PL_new_atom("^"), 2);
|
||||
|
||||
PL_register_foreign("init_python", 0, init_python, 0);
|
||||
PL_register_foreign("end_python", 0, end_python, 0);
|
||||
PL_register_foreign("python_import", 2, python_import, 0);
|
||||
PL_register_foreign("python_f", 3, python_f, 0);
|
||||
PL_register_foreign("python_o", 3, python_o, 0);
|
||||
PL_register_foreign("python_len", 2, python_len, 0);
|
||||
PL_register_foreign("python_is", 2, python_is, 0);
|
||||
PL_register_foreign("python_dir", 2, python_dir, 0);
|
||||
PL_register_foreign("python_apply", 3, python_apply, 0);
|
||||
PL_register_foreign("python_access", 3, python_access, 0);
|
||||
PL_register_foreign("python_assign", 2, python_assign, 0);
|
||||
PL_register_foreign("python_set_item", 3, python_set_item, 0);
|
||||
PL_register_foreign("python_run_command", 1, python_run_command, 0);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -27,31 +27,118 @@ A C-based Prolog interface to python.
|
|||
init_python/0,
|
||||
end_python/0,
|
||||
python_command/1,
|
||||
python/3
|
||||
python_assign/3,
|
||||
python/2,
|
||||
op(100,fy,$),
|
||||
op(950,fy,:=),
|
||||
op(950,yfx,:=),
|
||||
(:=)/2,
|
||||
(:=)/1
|
||||
]).
|
||||
|
||||
|
||||
/************************************************************************************************************
|
||||
|
||||
Python interface
|
||||
|
||||
Data types are
|
||||
|
||||
Python Prolog
|
||||
string atoms
|
||||
numbers numbers
|
||||
lists lists
|
||||
generic objs __pointer__(Address)
|
||||
|
||||
$(var) refers to the attribute __main__.var
|
||||
|
||||
*************************************************************************************************************/
|
||||
|
||||
:- use_module(library(shlib)).
|
||||
:- use_module(library(lists)).
|
||||
:- use_module(library(apply_macros)).
|
||||
:- use_module(library(charsio)).
|
||||
|
||||
python(Module:Function, IArgs, OArg) :-
|
||||
python_import(Module, MRef),
|
||||
python_f(MRef, Function, FRef),
|
||||
Args =.. [c|IArgs],
|
||||
python_apply(FRef, Args, OArg).
|
||||
:- dynamic python_mref_cache/2.
|
||||
|
||||
:= F :- python(F,_).
|
||||
|
||||
V := F :- var(V), !, python(F,V).
|
||||
'$'(V) := F :- atom(V), !, python(F,F1), python_assign(V, F1).
|
||||
A^Key := F :- python(F,F1), python_set_item(A, Key, F1).
|
||||
|
||||
python_do_import(Module, MRef) :-
|
||||
python_mref_cache(Module, MRef), !.
|
||||
python_do_import(Module, MRef) :-
|
||||
python_import(Module, MRef),
|
||||
assert( python_mref_cache(Module, MRef) ).
|
||||
|
||||
python_eval_term(Object:len, OArg) :- !,
|
||||
python_len(Object, OArg).
|
||||
python_eval_term(Module:Object:len, OArg) :- !,
|
||||
python_do_import(Module, MRef),
|
||||
python_o(MRef, Function, ORef),
|
||||
python_len(ORef, OArg).
|
||||
python_eval_term(Object:dir, OArg) :- !,
|
||||
python_dir(Object, OArg).
|
||||
python_eval_term(Module:Object:dir, OArg) :- !,
|
||||
python_do_import(Module, MRef),
|
||||
python_o(MRef, Function, ORef),
|
||||
python_dir(ORef, OArg).
|
||||
python_eval_term(Module:Object:Field, OArg) :-
|
||||
atom(Module),
|
||||
atom(Object), !,
|
||||
python_do_import(Module, MRef),
|
||||
python_o(MRef, Function, ORef),
|
||||
python_access(ORef, Field, OArg).
|
||||
python_eval_term(Module:Function, OArg) :-
|
||||
atom(Module), !,
|
||||
python_do_import(Module, MRef),
|
||||
functor(Function, F, _),
|
||||
python_f(MRef, F, FRef),
|
||||
python_apply(FRef, Function, OArg).
|
||||
python_eval_term(Obj:Field, OArg) :-
|
||||
python_access(Obj, Field, OArg).
|
||||
|
||||
python(Obj, Out) :-
|
||||
python_eval_term(Obj, Out), !.
|
||||
python(Obj, OArg) :-
|
||||
python_do_is(Obj, Obj1),
|
||||
python_is(Obj1, OArg).
|
||||
|
||||
python_do_is(A+B, NA+NB) :- !,
|
||||
python_do_is(A, NA),
|
||||
python_do_is(B, NB).
|
||||
python_do_is(A-B, NA-NB) :- !,
|
||||
python_do_is(A, NA),
|
||||
python_do_is(B, NB).
|
||||
python_do_is(A*B, NA*NB) :- !,
|
||||
python_do_is(A, NA),
|
||||
python_do_is(B, NB).
|
||||
python_do_is(A/B, NA/NB) :- !,
|
||||
python_do_is(A, NA),
|
||||
python_do_is(B, NB).
|
||||
python_do_is(A, NA) :-
|
||||
python_eval_term(A, NA), !.
|
||||
python_do_is(A, A).
|
||||
|
||||
python_command(Cmd) :-
|
||||
python_run_command(Cmd).
|
||||
python_run_command(Cmd).
|
||||
|
||||
start_python :-
|
||||
use_foreign_library(foreign(python)),
|
||||
init_python,
|
||||
python_command('import sys'),
|
||||
python_command('import sys').
|
||||
|
||||
add_cwd_to_python :-
|
||||
unix(getcwd(Dir)),
|
||||
atom_concat(['sys.path.append(\"',Dir,'\")'], Command),
|
||||
python_command(Command).
|
||||
% done
|
||||
|
||||
python_assign(Name, Exp, '$'(Name)) :-
|
||||
python_assign(Name, Exp).
|
||||
|
||||
:- initialization(start_python, now).
|
||||
|
||||
:- initialization(add_cwd_to_python).
|
||||
|
||||
|
|
|
|||
Reference in New Issue