C++ Dict::getItem方法代码示例

MapType CyPy_Element::dictAsElement(const Py::Dict& dict)
{
    MapType map;
    for (auto key : dict.keys()) {
        map.emplace(key.str(), asElement(dict.getItem(key)));
    }
    return map;
}

PyObject* Application::sAddCommand(PyObject * /*self*/, PyObject *args,PyObject * /*kwd*/)
{
    char*       pName;
    char*       pSource=0;
    PyObject*   pcCmdObj;
    if (!PyArg_ParseTuple(args, "sO|s", &pName,&pcCmdObj,&pSource))     // convert args: Python->C 
        return NULL;                    // NULL triggers exception 
#if 0
    std::string source = (pSource ? pSource : "");

    if (source.empty()) {
        try {
            Py::Module module(PyImport_ImportModule("inspect"),true);
            Py::Dict dict = module.getDict();
            Py::Callable call(dict.getItem("getsourcelines"));
            Py::Tuple arg(1);
            arg.setItem(0, Py::Object(pcCmdObj).getAttr("Activated"));
            Py::Tuple tuple(call.apply(arg));
            Py::List lines(tuple[0]);

            int pos=0;
            std::string code = (std::string)(Py::String(lines[1]));
            while (code[pos] == ' ' || code[pos] == '\t')
                pos++;
            for (Py::List::iterator it = lines.begin()+1; it != lines.end(); ++it) {
                Py::String str(*it);
                source += ((std::string)str).substr(pos);
            }
        }
        catch (Py::Exception& e) {
            e.clear();
        }
    }

    Application::Instance->commandManager().addCommand(new PythonCommand(pName,pcCmdObj,source.c_str()));
#else
    try {
		Application::Instance->commandManager().addCommand(new PythonCommand(pName,pcCmdObj,pSource));
    }
    catch (const Base::Exception& e) {
        PyErr_SetString(Base::BaseExceptionFreeCADError, e.what());
        return 0;
    }
    catch (...) {
        PyErr_SetString(Base::BaseExceptionFreeCADError, "Unknown C++ exception raised in Application::sAddCommand()");
        return 0;
    }
#endif
    Py_INCREF(Py_None);
    return Py_None;
}

MeshObject* MeshObject::createSphere(float radius, int sampling)
{
    // load the 'BuildRegularGeoms' module
    Base::PyGILStateLocker lock;
    try {
        Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
        Py::Dict dict = module.getDict();
        Py::Callable call(dict.getItem("Sphere"));
        Py::Tuple args(2);
        args.setItem(0, Py::Float(radius));
        args.setItem(1, Py::Int(sampling));
        Py::List list(call.apply(args));
        return createMeshFromList(list);
    }
    catch (Py::Exception& e) {
        e.clear();
    }

    return 0;
}

MeshObject* MeshObject::createCube(float length, float width, float height)
{
    // load the 'BuildRegularGeoms' module
    Base::PyGILStateLocker lock;
    try {
        Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
        Py::Dict dict = module.getDict();
        Py::Callable call(dict.getItem("Cube"));
        Py::Tuple args(3);
        args.setItem(0, Py::Float(length));
        args.setItem(1, Py::Float(width));
        args.setItem(2, Py::Float(height));
        Py::List list(call.apply(args));
        return createMeshFromList(list);
    }
    catch (Py::Exception& e) {
        e.clear();
    }

    return 0;
}

MeshObject* MeshObject::createCylinder(float radius, float length, int closed, float edgelen, int sampling)
{
    // load the 'BuildRegularGeoms' module
    Base::PyGILStateLocker lock;
    try {
        Py::Module module(PyImport_ImportModule("BuildRegularGeoms"),true);
        Py::Dict dict = module.getDict();
        Py::Callable call(dict.getItem("Cylinder"));
        Py::Tuple args(5);
        args.setItem(0, Py::Float(radius));
        args.setItem(1, Py::Float(length));
        args.setItem(2, Py::Int(closed));
        args.setItem(3, Py::Float(edgelen));
        args.setItem(4, Py::Int(sampling));
        Py::List list(call.apply(args));
        return createMeshFromList(list);
    }
    catch (Py::Exception& e) {
        e.clear();
    }

    return 0;
}

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.........

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.........

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.........

void PythonInterpreter::extractException(QStringList& errorlist, int& lineno)
{
    lineno = -1;

    PyObject *type, *value, *traceback;
    PyErr_Fetch(&type, &value, &traceback);
    Py_FlushLine();
    PyErr_NormalizeException(&type, &value, &traceback);
    if(traceback) {
        Py::List tblist;
        try {
            Py::Module tbmodule( PyImport_Import(Py::String("traceback").ptr()), true );
            Py::Dict tbdict = tbmodule.getDict();
            Py::Callable tbfunc(tbdict.getItem("format_tb"));
            Py::Tuple args(1);
            args.setItem(0, Py::Object(traceback));
            tblist = tbfunc.apply(args);
            uint length = tblist.length();
            for(Py::List::size_type i = 0; i < length; ++i)
                errorlist.append( Py::Object(tblist[i]).as_string().c_str() );
        }
        catch(Py::Exception& e) {
            QString err = Py::value(e).as_string().c_str();
            e.clear(); // exception is handled. clear it now.
            #ifdef KROSS_PYTHON_EXCEPTION_DEBUG
                krosswarning( QString("Kross::PythonScript::toException() Failed to fetch a traceback: %1").arg(err) );
            #endif
        }

        PyObject *next;
        while (traceback && traceback != Py_None) {
            PyFrameObject *frame = (PyFrameObject*)PyObject_GetAttrString(traceback, const_cast< char* >("tb_frame"));
            {
                PyObject *getobj = PyObject_GetAttrString(traceback, const_cast< char* >("tb_lineno") );
                lineno = PyInt_AsLong(getobj);
                Py_DECREF(getobj);
            }
            if(Py_OptimizeFlag) {
                PyObject *getobj = PyObject_GetAttrString(traceback, const_cast< char* >("tb_lasti") );
                int lasti = PyInt_AsLong(getobj);
                Py_DECREF(getobj);
                lineno = PyCode_Addr2Line(frame->f_code, lasti);
            }

            //const char* filename = PyString_AsString(frame->f_code->co_filename);
            //const char* name = PyString_AsString(frame->f_code->co_name);
            //errorlist.append( QString("%1#%2: \"%3\"").arg(filename).arg(lineno).arg(name) );

            //Py_DECREF(frame); // don't free cause we don't own it.

            next = PyObject_GetAttrString(traceback, const_cast< char* >("tb_next") );
            Py_DECREF(traceback);
            traceback = next;
        }
    }

    if(lineno < 0 && value && PyObject_HasAttrString(value, const_cast< char* >("lineno"))) {
        PyObject *getobj = PyObject_GetAttrString(value, const_cast< char* >("lineno") );
        if(getobj) {
            lineno = PyInt_AsLong(getobj);
            Py_DECREF(getobj);
        }
    }

    #ifdef KROSS_PYTHON_EXCEPTION_DEBUG
        //krossdebug( QString("PythonInterpreter::extractException: %1").arg( Py::Object(value).as_string().c_str() ) );
        krossdebug( QString("PythonInterpreter::extractException:\n%1").arg( errorlist.join("\n") ) );
    #endif
    PyErr_Restore(type, value, traceback);
}