C++ py::Object类代码示例

 py::Object next ( py::Object self )
 {
     const py::Object line = readline(self);
     if (line.handle() == py::none.handle()) {
         return (py::Object());
     }
     return (line);
 }

PythonObject::PythonObject(const Py::Object& object)
    : Qross::Object()
    , d(new Private(object))
{
    #ifdef QROSS_PYTHON_FUNCTION_DEBUG
        qrossdebug( QString("PythonObject::PythonObject() constructor") );
    #endif

    Py::List x( object.dir() );
    for(Py::Sequence::iterator i= x.begin(); i != x.end(); ++i) {
        std::string s = (*i).str();
        if(s == "__init__")
            continue;

        //if(! m_pyobject.hasAttr( (*i).str() )) continue;
        Py::Object o = d->m_pyobject.getAttr(s);

        #ifdef QROSS_PYTHON_FUNCTION_DEBUG
            QString t;
            if(o.isCallable()) t += "isCallable ";
            if(o.isDict()) t += "isDict ";
            if(o.isList()) t += "isList ";
            if(o.isMapping()) t += "isMapping ";
            if(o.isNumeric()) t += "isNumeric ";
            if(o.isSequence()) t += "isSequence ";
            if(o.isTrue()) t += "isTrue ";
            if(o.isInstance()) t += "isInstance ";
            qrossdebug( QString("PythonObject::PythonObject() method '%1' (%2)").arg( (*i).str().as_string().c_str() ).arg(t) );
        #endif

        if(o.isCallable())
            d->m_calls.append( (*i).str().as_string().c_str() );
    }
}

QMap<QString, CallTip> CallTipsList::extractTips(const QString& context) const
{
    Base::PyGILStateLocker lock;
    QMap<QString, CallTip> tips;
    if (context.isEmpty())
        return tips;

    try {
        QStringList items = context.split(QLatin1Char('.'));
        Py::Module module("__main__");
        Py::Dict dict = module.getDict();
        QString modname = items.front();
        items.pop_front();
        if (!dict.hasKey(std::string(modname.toAscii())))
            return tips; // unknown object

        // get the Python object we need
        Py::Object obj = dict.getItem(std::string(modname.toAscii()));
        while (!items.isEmpty()) {
            QByteArray name = items.front().toAscii();
            std::string attr = name.constData();
            items.pop_front();
            if (obj.hasAttr(attr))
                obj = obj.getAttr(attr);
            else
                return tips;
        }
        
        // Checks whether the type is a subclass of PyObjectBase because to get the doc string
        // of a member we must get it by its type instead of its instance otherwise we get the
        // wrong string, namely that of the type of the member. 
        // Note: 3rd party libraries may use their own type object classes so that we cannot 
        // reliably use Py::Type. To be on the safe side we should use Py::Object to assign
        // the used type object to.
        //Py::Object type = obj.type();
        Py::Object type(PyObject_Type(obj.ptr()), true);
        Py::Object inst = obj; // the object instance 
        union PyType_Object typeobj = {&Base::PyObjectBase::Type};
        union PyType_Object typedoc = {&App::DocumentObjectPy::Type};
        if (PyObject_IsSubclass(type.ptr(), typedoc.o) == 1) {
            // From the template Python object we don't query its type object because there we keep
            // a list of additional methods that we won't see otherwise. But to get the correct doc
            // strings we query the type's dict in the class itself.
            // To see if we have a template Python object we check for the existence of supportedProperties
            if (!type.hasAttr("supportedProperties")) {
                obj = type;
            }
        }
        else if (PyObject_IsSubclass(type.ptr(), typeobj.o) == 1) {
            obj = type;
        }
        
        // If we have an instance of PyObjectBase then determine whether it's valid or not
        if (PyObject_IsInstance(inst.ptr(), typeobj.o) == 1) {
            Base::PyObjectBase* baseobj = static_cast<Base::PyObjectBase*>(inst.ptr());
            const_cast<CallTipsList*>(this)->validObject = baseobj->isValid();
        }
        else {
            // PyObject_IsInstance might set an exception
            PyErr_Clear();
        }

        Py::List list(PyObject_Dir(obj.ptr()), true);

        // If we derive from PropertyContainerPy we can search for the properties in the
        // C++ twin class.
        union PyType_Object proptypeobj = {&App::PropertyContainerPy::Type};
        if (PyObject_IsSubclass(type.ptr(), proptypeobj.o) == 1) {
            // These are the attributes of the instance itself which are NOT accessible by
            // its type object
            extractTipsFromProperties(inst, tips);
        }

        // If we derive from App::DocumentPy we have direct access to the objects by their internal
        // names. So, we add these names to the list, too.
        union PyType_Object appdoctypeobj = {&App::DocumentPy::Type};
        if (PyObject_IsSubclass(type.ptr(), appdoctypeobj.o) == 1) {
            App::DocumentPy* docpy = (App::DocumentPy*)(inst.ptr());
            App::Document* document = docpy->getDocumentPtr();
            // Make sure that the C++ object is alive
            if (document) {
                std::vector<App::DocumentObject*> objects = document->getObjects();
                Py::List list;
                for (std::vector<App::DocumentObject*>::iterator it = objects.begin(); it != objects.end(); ++it)
                    list.append(Py::String((*it)->getNameInDocument()));
                extractTipsFromObject(inst, list, tips);
            }
        }

        // If we derive from Gui::DocumentPy we have direct access to the objects by their internal
        // names. So, we add these names to the list, too.
        union PyType_Object guidoctypeobj = {&Gui::DocumentPy::Type};
        if (PyObject_IsSubclass(type.ptr(), guidoctypeobj.o) == 1) {
            Gui::DocumentPy* docpy = (Gui::DocumentPy*)(inst.ptr());
            if (docpy->getDocumentPtr()) {
                App::Document* document = docpy->getDocumentPtr()->getDocument();
                // Make sure that the C++ object is alive
                if (document) {
                    std::vector<App::DocumentObject*> objects = document->getObjects();
                    Py::List list;
//.........这里部分代码省略.........

TaskWatcherPython::TaskWatcherPython(const Py::Object& o)
  : TaskWatcher(0), watcher(o)
{
    QString title;
    if (watcher.hasAttr(std::string("title"))) {
        Py::String name(watcher.getAttr(std::string("title")));
        std::string s = (std::string)name;
        title = QString::fromUtf8(s.c_str());
    }

    QPixmap icon;
    if (watcher.hasAttr(std::string("icon"))) {
        Py::String name(watcher.getAttr(std::string("icon")));
        std::string s = (std::string)name;
        icon = BitmapFactory().pixmap(s.c_str());
    }

    Gui::TaskView::TaskBox *tb = 0;
    if (watcher.hasAttr(std::string("commands"))) {
        if (!tb) tb = new Gui::TaskView::TaskBox(icon, title, true, 0);
        Py::List cmds(watcher.getAttr(std::string("commands")));
        CommandManager &mgr = Gui::Application::Instance->commandManager();
        for (Py::List::iterator it = cmds.begin(); it != cmds.end(); ++it) {
            Py::String name(*it);
            std::string s = (std::string)name;
            Command *c = mgr.getCommandByName(s.c_str());
            if (c)
                c->addTo(tb);
        }
    }

    if (watcher.hasAttr(std::string("widgets"))) {
        if (!tb && !title.isEmpty())
            tb = new Gui::TaskView::TaskBox(icon, title, true, 0);
        Py::List list(watcher.getAttr(std::string("widgets")));
        Py::Module mainmod(PyImport_AddModule((char*)"sip"));
        Py::Callable func = mainmod.getDict().getItem("unwrapinstance");
        for (Py::List::iterator it = list.begin(); it != list.end(); ++it) {
            Py::Tuple arguments(1);
            arguments[0] = *it; //PyQt pointer
            Py::Object result = func.apply(arguments);
            void* ptr = PyLong_AsVoidPtr(result.ptr());
            QObject* object = reinterpret_cast<QObject*>(ptr);
            if (object) {
                QWidget* w = qobject_cast<QWidget*>(object);
                if (w) {
                    if (tb)
                        tb->groupLayout()->addWidget(w);
                    else
                        Content.push_back(w);
                }
            }
        }
    }

    if (tb) Content.push_back(tb);

    if (watcher.hasAttr(std::string("filter"))) {
        Py::String name(watcher.getAttr(std::string("filter")));
        std::string s = (std::string)name;
        this->setFilter(s.c_str());
    }
}

PythonInterpreter::PythonInterpreter(Kross::InterpreterInfo* info)
    : Kross::Interpreter(info)
    , d(new PythonInterpreterPrivate())
{
    // Initialize the python interpreter.
    initialize();

    // Set name of the program.
    Py_SetProgramName(const_cast<char*>("Kross"));

    /*
    // Set arguments.
    //char* comm[0];
    const char* comm = const_cast<char*>("kross"); // name.
    PySys_SetArgv(1, comm);
    */

    // In the python sys.path are all module-directories are
    // listed in.
    QString path;

    // First import the sys-module to remember it's sys.path
    // list in our path QString.
    Py::Module sysmod( PyImport_ImportModule( (char*)"sys" ), true );
    Py::Dict sysmoddict = sysmod.getDict();
    Py::Object syspath = sysmoddict.getItem("path");
    if(syspath.isList()) {
        Py::List syspathlist = syspath;
        for(Py::List::iterator it = syspathlist.begin(); it != syspathlist.end(); ++it) {
            if( ! (*it).isString() ) continue;
            QString s = PythonType<QString>::toVariant(*it);
            path.append( s + PYPATHDELIMITER );
        }
    }
    else
        path = Py_GetPath();

#if 0
    // Determinate additional module-paths we like to add.
    // First add the global Kross modules-path.
    QStringList krossdirs = KGlobal::dirs()->findDirs("data", "kross/python");
    for(QStringList::Iterator krossit = krossdirs.begin(); krossit != krossdirs.end(); ++krossit)
        path.append(*krossit + PYPATHDELIMITER);
    // Then add the application modules-path.
    QStringList appdirs = KGlobal::dirs()->findDirs("appdata", "kross/python");
    for(QStringList::Iterator appit = appdirs.begin(); appit != appdirs.end(); ++appit)
        path.append(*appit + PYPATHDELIMITER);
#endif

    // Set the extended sys.path.
    PySys_SetPath( (char*) path.toLatin1().data() );

    #ifdef KROSS_PYTHON_INTERPRETER_DEBUG
        krossdebug(QString("Python ProgramName: %1").arg(Py_GetProgramName()));
        krossdebug(QString("Python ProgramFullPath: %1").arg(Py_GetProgramFullPath()));
        krossdebug(QString("Python Version: %1").arg(Py_GetVersion()));
        krossdebug(QString("Python Platform: %1").arg(Py_GetPlatform()));
        krossdebug(QString("Python Prefix: %1").arg(Py_GetPrefix()));
        krossdebug(QString("Python ExecPrefix: %1").arg(Py_GetExecPrefix()));
        //krossdebug(QString("Python Path: %1").arg(Py_GetPath()));
        //krossdebug(QString("Python System Path: %1").arg(path));
    #endif

    // Initialize the main module.
    d->mainmodule = new PythonModule(this);

    // The main dictonary.
    Py::Dict moduledict = d->mainmodule->getDict();
    //TODO moduledict["KrossPythonVersion"] = Py::Int(KROSS_PYTHON_VERSION);

    // Prepare the interpreter.
    QString s =
        //"# -*- coding: iso-8859-1 -*-\n"
        //"import locale\n"
        //"locale.setlocale(locale.LC_ALL, '')\n"
        //"# -*- coding: latin-1 -*\n"
        //"# -*- coding: utf-8 -*-\n"
        //"import locale\n"
        //"locale.setlocale(locale.LC_ALL, '')\n"
        //"from __future__ import absolute_import\n"
        "import sys\n"
        //"import os, os.path\n"
        //"sys.setdefaultencoding('latin-1')\n"

        // Dirty hack to get sys.argv defined. Needed for e.g. TKinter.
        "sys.argv = ['']\n"

        // On the try to read something from stdin always return an empty
        // string. That way such reads don't block our script.
        // Deactivated since sys.stdin has the encoding attribute needed
        // by e.g. LiquidWeather and those attr is missing in StringIO
        // and cause it's buildin we can't just add it but would need to
        // implement our own class. Grrrr, what a stupid design :-/
        //"try:\n"
        //"    import cStringIO\n"
        //"    sys.stdin = cStringIO.StringIO()\n"
        //"except:\n"
        //"    pass\n"

        // Class to redirect something. We use this class e.g. to redirect
//.........这里部分代码省略.........

QMap<QString, CallTip> CallTipsList::extractTips(const QString& context) const
{
    Base::PyGILStateLocker lock;
    QMap<QString, CallTip> tips;
    if (context.isEmpty())
        return tips;

    try {
        Py::Module module("__main__");
        Py::Dict dict = module.getDict();
#if 0
        QStringList items = context.split(QLatin1Char('.'));
        QString modname = items.front();
        items.pop_front();
        if (!dict.hasKey(std::string(modname.toLatin1())))
            return tips; // unknown object

        // get the Python object we need
        Py::Object obj = dict.getItem(std::string(modname.toLatin1()));
        while (!items.isEmpty()) {
            QByteArray name = items.front().toLatin1();
            std::string attr = name.constData();
            items.pop_front();
            if (obj.hasAttr(attr))
                obj = obj.getAttr(attr);
            else
                return tips;
        }
#else
        // Don't use hasattr & getattr because if a property is bound to a method this will be executed twice.
        PyObject* code = Py_CompileString(static_cast<const char*>(context.toLatin1()), "<CallTipsList>", Py_eval_input);
        if (!code) {
            PyErr_Clear();
            return tips;
        }

        PyObject* eval = 0;
        if (PyCode_Check(code)) {
            eval = PyEval_EvalCode(reinterpret_cast<PyCodeObject*>(code), dict.ptr(), dict.ptr());
        }
        Py_DECREF(code);
        if (!eval) {
            PyErr_Clear();
            return tips;
        }
        Py::Object obj(eval, true);
#endif

        // Checks whether the type is a subclass of PyObjectBase because to get the doc string
        // of a member we must get it by its type instead of its instance otherwise we get the
        // wrong string, namely that of the type of the member. 
        // Note: 3rd party libraries may use their own type object classes so that we cannot 
        // reliably use Py::Type. To be on the safe side we should use Py::Object to assign
        // the used type object to.
        //Py::Object type = obj.type();
        Py::Object type(PyObject_Type(obj.ptr()), true);
        Py::Object inst = obj; // the object instance 
        union PyType_Object typeobj = {&Base::PyObjectBase::Type};
        union PyType_Object typedoc = {&App::DocumentObjectPy::Type};
        union PyType_Object basetype = {&PyBaseObject_Type};

        if (PyObject_IsSubclass(type.ptr(), typedoc.o) == 1) {
            // From the template Python object we don't query its type object because there we keep
            // a list of additional methods that we won't see otherwise. But to get the correct doc
            // strings we query the type's dict in the class itself.
            // To see if we have a template Python object we check for the existence of supportedProperties
            if (!type.hasAttr("supportedProperties")) {
                obj = type;
            }
        }
        else if (PyObject_IsSubclass(type.ptr(), typeobj.o) == 1) {
            obj = type;
        }
        else if (PyInstance_Check(obj.ptr())) {
            // instances of old style classes
            PyInstanceObject* inst = reinterpret_cast<PyInstanceObject*>(obj.ptr());
            PyObject* classobj = reinterpret_cast<PyObject*>(inst->in_class);
            obj = Py::Object(classobj);
        }
        else if (PyObject_IsInstance(obj.ptr(), basetype.o) == 1) {
            // New style class which can be a module, type, list, tuple, int, float, ...
            // Make sure it's not a type objec
            union PyType_Object typetype = {&PyType_Type};
            if (PyObject_IsInstance(obj.ptr(), typetype.o) != 1) {
                // this should be now a user-defined Python class
                // http://stackoverflow.com/questions/12233103/in-python-at-runtime-determine-if-an-object-is-a-class-old-and-new-type-instan
                if (Py_TYPE(obj.ptr())->tp_flags & Py_TPFLAGS_HEAPTYPE) {
                    obj = type;
                }
            }
        }

        // If we have an instance of PyObjectBase then determine whether it's valid or not
        if (PyObject_IsInstance(inst.ptr(), typeobj.o) == 1) {
            Base::PyObjectBase* baseobj = static_cast<Base::PyObjectBase*>(inst.ptr());
            const_cast<CallTipsList*>(this)->validObject = baseobj->isValid();
        }
        else {
            // PyObject_IsInstance might set an exception
            PyErr_Clear();
//.........这里部分代码省略.........

void CallTipsList::extractTipsFromObject(Py::Object& obj, Py::List& list, QMap<QString, CallTip>& tips) const
{
    try {
        for (Py::List::iterator it = list.begin(); it != list.end(); ++it) {
            Py::String attrname(*it);
            Py::Object attr = obj.getAttr(attrname.as_string());

            CallTip tip;
            QString str = QString::fromLatin1(attrname.as_string().c_str());
            tip.name = str;

            if (attr.isCallable()) {
                union PyType_Object basetype = {&PyBaseObject_Type};
                if (PyObject_IsSubclass(attr.ptr(), basetype.o) == 1) {
                    tip.type = CallTip::Class;
                }
                else {
                    PyErr_Clear(); // PyObject_IsSubclass might set an exception
                    tip.type = CallTip::Method;
                }
            }
            else if (PyModule_Check(attr.ptr())) {
                tip.type = CallTip::Module;
            }
            else {
                tip.type = CallTip::Member;
            }

            if (str == QLatin1String("__doc__") && attr.isString()) {
                Py::Object help = attr;
                if (help.isString()) {
                    Py::String doc(help);
                    QString longdoc = QString::fromUtf8(doc.as_string().c_str());
                    int pos = longdoc.indexOf(QLatin1Char('\n'));
                    pos = qMin(pos, 70);
                    if (pos < 0) 
                        pos = qMin(longdoc.length(), 70);
                    tip.description = stripWhiteSpace(longdoc);
                    tip.parameter = longdoc.left(pos);
                }
            }
            else if (attr.hasAttr("__doc__")) {
                Py::Object help = attr.getAttr("__doc__");
                if (help.isString()) {
                    Py::String doc(help);
                    QString longdoc = QString::fromUtf8(doc.as_string().c_str());
                    int pos = longdoc.indexOf(QLatin1Char('\n'));
                    pos = qMin(pos, 70);
                    if (pos < 0) 
                        pos = qMin(longdoc.length(), 70);
                    tip.description = stripWhiteSpace(longdoc);
                    tip.parameter = longdoc.left(pos);
                }
            }
            tips[str] = tip;
        }
    }
    catch (Py::Exception& e) {
        // Just clear the Python exception
        e.clear();
    }
}