func main() {
log.Info("python embedding test in golang, using `pthreads`.")
n := 400
var _wg sync.WaitGroup
_wg.Add(n)
for i := 0; i < n; i++ {
go create_thread(func(result *C.PyObject) {
defer _wg.Done()
_result_string := C.GoString(C.PyString_AsString(result))
log.Debug("< got result string: %v (%T)", _result_string, _result_string)
var _parsed []interface{}
if _err := json.Unmarshal([]byte(_result_string), &_parsed); _err != nil {
panic(fmt.Errorf("got invalid result from python function, `%v`", _result_string))
}
log.Debug(
"< got thread_id=%v\tnow=%s",
int64(_parsed[0].(float64)),
_parsed[1].(string),
)
})
}
_wg.Wait()
}
func pyObjToInterface(o *C.PyObject) interface{} {
if C.myPyString_Check(o) != 0 {
return C.GoStringN(C.PyString_AsString(o), C.int(C.PyString_Size(o)))
} else if C.myPyInt_Check(o) != 0 {
return int64(C.PyInt_AsLong(o))
} else if C.myPyDict_Check(o) != 0 {
v := make(map[interface{}]interface{})
items := C.PyDict_Items(o)
for i := 0; i < int(C.PyTuple_Size(items)); i++ {
item := C.PyTuple_GetItem(items, C.Py_ssize_t(i))
key := C.PyTuple_GetItem(item, 0)
value := C.PyTuple_GetItem(item, 1)
v[pyObjToInterface(key)] = pyObjToInterface(value)
}
C.Py_DecRef(items)
return v
} else if C.myPyTuple_Check(o) != 0 {
length := int(C.PyTuple_Size(o))
list := make([]interface{}, length)
for i := 0; i < length; i++ {
list[i] = pyObjToInterface(C.PyTuple_GetItem(o, C.Py_ssize_t(i)))
}
return list
}
return nil
}
func write_response_body(w http.ResponseWriter, iterator *C.PyObject) {
_iterator := C.PyObject_GetIter(iterator)
defer func() {
C.Py_DecRef(_iterator)
C.Py_DecRef(iterator)
}()
if _iterator == nil {
return
}
for {
item := C.PyIter_Next(_iterator)
if item == nil || C._PyString_Check(item) != 1 {
C.Py_DecRef(item)
break
}
length := C.PyString_Size(item)
if length < 1 {
C.Py_DecRef(item)
break
}
_s := C.PyString_AsString(item)
w.Write([]byte(C.GoString(_s)))
C.Py_DecRef(item)
}
}
func (s *String) String() string {
if s == nil {
return "<nil>"
}
ret := C.PyString_AsString(s.c())
return C.GoString(ret)
}
func (t *Type) String() string {
pyS := C.PyObject_Str(c(t))
if pyS == nil {
return "<unknown type>"
}
return C.GoString(C.PyString_AsString(pyS))
}
// decodeType translates a Python object to a Go value. Its type must be
// non-zero.
func decodeType(pyType C.int, pyValue *C.PyObject) (value interface{}, err error) {
switch pyType {
case 0:
err = getError()
case 1:
// nil
case 2:
value = false
case 3:
value = true
case 4:
value = C.GoString(C.PyString_AsString(pyValue))
case 5:
value = int(C.PyInt_AsLong(pyValue))
case 6:
var overflow C.int
i := int64(C.PyLong_AsLongLongAndOverflow(pyValue, &overflow))
switch overflow {
case -1:
err = fmt.Errorf("Python integer %s is too small", stringify(pyValue))
case 0:
value = i
case 1:
n := uint64(C.PyLong_AsUnsignedLongLong(pyValue))
if n == 0xffffffffffffffff {
C.PyErr_Clear()
err = fmt.Errorf("Python integer %s is too large", stringify(pyValue))
} else {
value = n
}
}
case 7:
value = float64(C.PyFloat_AsDouble(pyValue))
case 8:
value = complex(C.PyComplex_RealAsDouble(pyValue), C.PyComplex_ImagAsDouble(pyValue))
case 9:
return decodeSequence(pyValue)
case 10:
return decodeMapping(pyValue)
default:
err = fmt.Errorf("unable to translate %s from Python", stringify(C.PyObject_Type(pyValue)))
return
}
return
}
func (s *String) String() string {
if s == nil {
return "<nil>"
}
ret := C.PyString_AsString(c(s))
if ret == nil {
panic(exception())
}
return C.GoString(ret)
}
// Error() returns a string representation of the Python exception represented
// by the Error e. This is the same as the final line of the Python output from
// an uncaught exception.
func (e *Error) Error() string {
ts := ""
en := C.excName(c(e.Kind))
if en.c == nil {
tpyS := C.PyObject_Str(c(e.Kind))
defer C.decref(tpyS)
ts = C.GoString(C.PyString_AsString(tpyS))
} else {
if en.m != nil {
ts = C.GoString(en.m) + "."
}
ts += C.GoString(en.c)
}
pyS := C.PyObject_Str(c(e.Value))
defer C.decref(pyS)
s := C.GoString(C.PyString_AsString(pyS))
return fmt.Sprintf("%s: %s", ts, s)
}
func stringify(pyObject *C.PyObject) (s string) {
if pyResult := C.PyObject_Str(pyObject); pyResult != nil {
defer C.DECREF(pyResult)
if cString := C.PyString_AsString(pyResult); cString != nil {
s = C.GoString(cString)
}
}
C.PyErr_Clear()
return
}
func PickleDumps(v interface{}) []byte {
pickleLock.Lock()
if initialized == 0 {
pickleInit()
}
obj := interfaceToPyObj(v)
str := C.PyObject_CallFunction2(pickleDumps, obj, highestProtocol)
gobytes := C.GoBytes(unsafe.Pointer(C.PyString_AsString(str)), C.int(C.PyString_Size(str)))
C.Py_DecRef(obj)
C.Py_DecRef(str)
pickleLock.Unlock()
return gobytes
}
func (u *Unicode) String() string {
if u == nil {
return "<nil>"
}
s := C.PyUnicode_AsUTF8String(c(u))
if s == nil {
panic(exception())
}
defer C.decref(s)
ret := C.PyString_AsString(s)
if ret == nil {
panic(exception())
}
return C.GoString(ret)
}
func main() {
logging.SetLevel(logging.INFO, "pyingo")
logging.SetLevel(logging.DEBUG, "pyingo")
log.Info("main")
python := pyingo.NewPython(1)
_result, _err := python.Run("json_dumps:run")
_unsafed := (*C.PyObject)(unsafe.Pointer(_result.Ptr))
fmt.Printf(" C.PyString_AsString: %s, %T\n", C.GoString(C.PyString_AsString(_unsafed)), _unsafed)
fmt.Printf("pyingo.PyString_AsString: %s, %T\n", pyingo.PyString_AsString(_result), _unsafed)
fmt.Printf("result: %v, err: %v\n", _result, _err)
}
func PyString_AsString(s *C.PyObject) string {
return C.GoString(C.PyString_AsString(s))
}
// char* PyString_AsString(PyObject *string)
// Return a NUL-terminated representation of the contents of string. The pointer refers to the internal buffer of string, not a copy. The data must not be modified in any way, unless the string was just created using PyString_FromStringAndSize(NULL, size). It must not be deallocated. If string is a Unicode object, this function computes the default encoding of string and operates on that. If string is not a string object at all, PyString_AsString() returns NULL and raises TypeError.
func PyString_AsString(self *PyObject) string {
c_str := C.PyString_AsString(self.ptr)
// we dont own c_str...
//defer C.free(unsafe.Pointer(c_str))
return C.GoString(c_str)
}
func PyString_AsString(s *PyObject) string {
return C.GoString(C.PyString_AsString(s.Ptr))
}
