Function addToPythonPath

src/EnergyPlus/PythonEngine.cc:186–225

    }

    void addToPythonPath(EnergyPlusData &state, const fs::path &includePath, bool userDefinedPath)
    {
        if (includePath.empty()) {
            return;
        }

        // We use generic_string / generic_wstring here, which will always use a forward slash as directory separator even on windows
        // This doesn't handle the (very strange, IMHO) case were on unix you have backlashes (which are VALID filenames on Unix!)
        // Could use FileSystem::makeNativePath first to convert the backslashes to forward slashes on Unix
        PyObject *unicodeIncludePath = nullptr;
        if constexpr (std::is_same_v<typename fs::path::value_type, wchar_t>) {
            const std::wstring ws = includePath.generic_wstring();
            unicodeIncludePath = PyUnicode_FromWideChar(ws.c_str(), static_cast<Py_ssize_t>(ws.size())); // New reference
        } else {
            const std::string s = includePath.generic_string();
            unicodeIncludePath = PyUnicode_FromString(s.c_str()); // New reference
        }
        if (unicodeIncludePath == nullptr) {
            EnergyPlus::ShowFatalError(
                state, EnergyPlus::format("ERROR converting the path \"{}\" for addition to the sys.path in Python", includePath.generic_string()));
        }

        PyObject *sysPath = PySys_GetObject("path"); // Borrowed reference
        int const ret = PyList_Insert(sysPath, 0, unicodeIncludePath);
        Py_DECREF(unicodeIncludePath);

        if (ret != 0) {
            if (PyErr_Occurred() != nullptr) {
                reportPythonError(state);
            }
            EnergyPlus::ShowFatalError(state, EnergyPlus::format("ERROR adding \"{}\" to the sys.path in Python", includePath.generic_string()));
        }

        if (userDefinedPath) {
            EnergyPlus::ShowMessage(state,
                                    EnergyPlus::format("Successfully added path \"{}\" to the sys.path in Python", includePath.generic_string()));
        }

        // PyRun_SimpleString)("print(' EPS : ' + str(sys.path))");
    }

    void initPython(EnergyPlusData &state, fs::path const &pathToPythonPackages)
    {