Warning, file /education/cantor/src/backends/python/pythonserver.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
     SPDX-License-Identifier: GPL-2.0-or-later
     SPDX-FileCopyrightText: 2015 Minh Ngo <minh@fedoraproject.org>
     SPDX-FileCopyrightText: 2022 Alexander Semke <alexander.semke@web.de>
 */
 
 #include "pythonserver.h"
 #include <vector>
 #include <cassert>
 #include <iostream>
 
 #include <Python.h>
 
 static_assert(PY_MAJOR_VERSION == 3, "This python server works only with Python 3");
 
 using namespace std;
 
 namespace
 {
     string pyObjectToQString(PyObject* obj)
     {
         return string(PyUnicode_AsUTF8(obj));
     }
 }
 
 void PythonServer::login()
 {
     Py_InspectFlag = 1;
     Py_Initialize();
     m_pModule = PyImport_AddModule("__main__");
     PyRun_SimpleString("import sys");
     filePath = "python_cantor_worksheet";
 }
 
 void PythonServer::interrupt()
 {
     PyErr_SetInterrupt();
 }
 
 void PythonServer::runPythonCommand(const string& command)
 {
     PyObject* py_dict = PyModule_GetDict(m_pModule);
     m_error = false;
 
     const char* prepareCommand =
         "import sys;\n"\
         "class CatchOutPythonBackend:\n"\
         "  def __init__(self, std_stream):\n"\
         "    self.value = ''\n"\
         "    self.encoding = std_stream.encoding\n"\
         "  def flush():\n"\
         "    pass\n"\
         "  def write(self, txt):\n"\
         "    self.value += txt\n"\
         "outputPythonBackend = CatchOutPythonBackend(sys.stdout)\n"\
         "errorPythonBackend  = CatchOutPythonBackend(sys.stderr)\n"\
         "sys.stdout = outputPythonBackend\n"\
         "sys.stderr = errorPythonBackend\n";
     PyRun_SimpleString(prepareCommand);
 
     PyObject* compile = Py_CompileString(command.c_str(), filePath.c_str(), Py_single_input);
     // There are two reasons for the error:
     // 1) This code is not single expression, so we can't compile this with flag Py_single_input
     // 2) There are errors in the code
     if (PyErr_Occurred())
     {
         PyErr_Clear();
         // Try to recompile code as sequence of expressions
         compile = Py_CompileString(command.c_str(), filePath.c_str(), Py_file_input);
         if (PyErr_Occurred())
         {
             // We now know, that we have a syntax error, so print the traceback and exit
             m_error = true;
             PyErr_PrintEx(0);
             return;
         }
     }
     PyEval_EvalCode(compile, py_dict, py_dict);
 
     if (PyErr_Occurred())
     {
         m_error = true;
         PyErr_PrintEx(0);
     }
 }
 
 string PythonServer::getError() const
 {
     PyObject *errorPython = PyObject_GetAttrString(m_pModule, "errorPythonBackend");
     PyObject *error = PyObject_GetAttrString(errorPython, "value");
 
     return pyObjectToQString(error);
 }
 
 string PythonServer::getOutput() const
 {
     PyObject *outputPython = PyObject_GetAttrString(m_pModule, "outputPythonBackend");
     PyObject *output = PyObject_GetAttrString(outputPython, "value");
 
     return pyObjectToQString(output);
 }
 
 void PythonServer::setFilePath(const string& path, const string& dir)
 {
     PyRun_SimpleString(("import sys; sys.argv = ['" + path + "']").c_str());
     if (path.length() == 0) // New session, not from file
     {
         PyRun_SimpleString("import sys; sys.path.insert(0, '')");
     }
     else
     {
         this->filePath = path;
         PyRun_SimpleString(("import sys; sys.path.insert(0, '" + dir + "')").c_str());
         PyRun_SimpleString(("__file__ = '"+path+"'").c_str());
     }
 }
 
 string PythonServer::variables(bool parseValue)
 {
     PyRun_SimpleStringFlags(
         "try: \n"
         "   import numpy \n"
         "   __cantor_numpy_internal__ = numpy.get_printoptions()['threshold'] \n"
         "   numpy.set_printoptions(threshold=100000000) \n"
         "except ModuleNotFoundError: \n"
         "   pass \n", nullptr
     );
 
     PyObject* py_dict = PyModule_GetDict(m_pModule);
     PyRun_SimpleString("__tmp_globals__ = globals()");
     PyObject* globals = PyObject_GetAttrString(m_pModule,"__tmp_globals__");
     PyObject *key, *value;
     Py_ssize_t pos = 0;
 
     vector<string> vars;
     while (PyDict_Next(globals, &pos, &key, &value)) {
         const string& keyString = pyObjectToQString(key);
         if (keyString.substr(0, 2) == string("__"))
             continue;
 
         if (keyString == string("CatchOutPythonBackend")
             || keyString == string("errorPythonBackend")
             || keyString == string("outputPythonBackend"))
             continue;
 
         if (PyModule_Check(value))
             continue;
 
         if (PyFunction_Check(value))
             continue;
 
         if (PyType_Check(value))
             continue;
 
         string valueString;
         string sizeString;
         string typeString;
         if (parseValue)
         {
             valueString = pyObjectToQString(PyObject_Repr(value));
 
             string command = "sys.getsizeof(" + keyString + ")";
             sizeString = pyObjectToQString(PyObject_Repr(PyRun_String(command.c_str(), Py_eval_input, py_dict, py_dict)));
 
             command = "type(" + keyString + ")";
             typeString = pyObjectToQString(PyObject_Repr(PyRun_String(command.c_str(), Py_eval_input, py_dict, py_dict)));
         }
 
         vars.push_back(keyString + char(17) + valueString + char(17) + sizeString + char(17) + typeString);
     }
 
     PyRun_SimpleStringFlags(
         "try: \n"
         "   import numpy \n"
         "   numpy.set_printoptions(threshold=__cantor_numpy_internal__) \n"
         "   del __cantor_numpy_internal__ \n"
         "except ModuleNotFoundError: \n"
         "   pass \n", nullptr
     );
 
     string result;
     for (const string& s : vars)
         result += s + char(18);
     result += char(18);
     return result;
 }
 
 bool PythonServer::isError() const
 {
     return m_error;
 }