How to use the spyder.config.main.CONF.get function in spyder

# then set them again as floating windows here.
        for widget in self.floating_dockwidgets:
            widget.setFloating(True)

        # In MacOS X 10.7 our app is not displayed after initialized (I don't
        # know why because this doesn't happen when started from the terminal),
        # so we need to resort to this hack to make it appear.
        if running_in_mac_app():
            idx = __file__.index(MAC_APP_NAME)
            app_path = __file__[:idx]
            subprocess.call(['open', app_path + MAC_APP_NAME])

        # Server to maintain just one Spyder instance and open files in it if
        # the user tries to start other instances with
        # $ spyder foo.py
        if CONF.get('main', 'single_instance') and not self.new_instance:
            t = threading.Thread(target=self.start_open_files_server)
            t.setDaemon(True)
            t.start()

            # Connect the window to the signal emmited by the previous server
            # when it gets a client connected to it
            self.sig_open_external_file.connect(self.open_external_file)

        # Create Plugins and toolbars submenus
        self.create_plugins_menu()
        self.create_toolbars_menu()

        self.extconsole.setMinimumHeight(0)

        # Update toolbar visibility status
        self.toolbars_visible = CONF.get('main', 'toolbars_visible')

def apply_statusbar_settings(self):
        """Update status bar widgets settings"""
        show_status_bar = CONF.get('main', 'show_status_bar')
        self.statusBar().setVisible(show_status_bar)

        if show_status_bar:
            for widget, name in ((self.mem_status, 'memory_usage'),
                                 (self.cpu_status, 'cpu_usage')):
                if widget is not None:
                    widget.setVisible(CONF.get('main', '%s/enable' % name))
                    widget.set_interval(CONF.get('main', '%s/timeout' % name))
        else:
            return

def load_connection_settings(self):
        """Load the user's previously-saved kernel connection settings."""
        existing_kernel = CONF.get("existing-kernel", "settings", {})

        connection_file_path = existing_kernel.get("json_file_path", "")
        is_remote = existing_kernel.get("is_remote", False)
        username = existing_kernel.get("username", "")
        hostname = existing_kernel.get("hostname", "")
        port = str(existing_kernel.get("port", 22))
        is_ssh_kf = existing_kernel.get("is_ssh_keyfile", False)
        ssh_kf = existing_kernel.get("ssh_key_file_path", "")

        if connection_file_path != "":
            self.cf.setText(connection_file_path)
        if username != "":
            self.un.setText(username)
        if hostname != "":
            self.hn.setText(hostname)
        if ssh_kf != "":

if self.get_option('pythonstartup/default'):
                pythonstartup = None
            else:
                pythonstartup = self.get_option('pythonstartup', None)
            monitor_enabled = self.get_option('monitor/enabled')
            mpl_backend = self.get_option('matplotlib/backend/value')
            ets_backend = self.get_option('ets_backend')
            qt_api = self.get_option('qt/api')
            if qt_api not in ('pyqt', 'pyside', 'pyqt5'):
                qt_api = None
            merge_output_channels = self.get_option('merge_output_channels')
            colorize_sys_stderr = self.get_option('colorize_sys_stderr')
            umr_enabled = CONF.get('main_interpreter', 'umr/enabled')
            umr_namelist = CONF.get('main_interpreter', 'umr/namelist')
            umr_verbose = CONF.get('main_interpreter', 'umr/verbose')
            ar_timeout = CONF.get('variable_explorer', 'autorefresh/timeout')
            ar_state = CONF.get('variable_explorer', 'autorefresh')

            sa_settings = None
            shellwidget = ExternalPythonShell(self, fname, wdir,
                           interact, debug, post_mortem=post_mortem,
                           path=pythonpath,
                           python_args=python_args,
                           arguments=args, stand_alone=sa_settings,
                           pythonstartup=pythonstartup,
                           pythonexecutable=pythonexecutable,
                           external_interpreter=external_interpreter,
                           umr_enabled=umr_enabled, umr_namelist=umr_namelist,
                           umr_verbose=umr_verbose, ets_backend=ets_backend,
                           monitor_enabled=monitor_enabled,
                           mpl_backend=mpl_backend, qt_api=qt_api,
                           merge_output_channels=merge_output_channels,

pythonexecutable = CONF.get('main_interpreter', 'executable')
                external_interpreter = True
            if self.get_option('pythonstartup/default'):
                pythonstartup = None
            else:
                pythonstartup = self.get_option('pythonstartup', None)
            monitor_enabled = self.get_option('monitor/enabled')
            mpl_backend = self.get_option('matplotlib/backend/value')
            ets_backend = self.get_option('ets_backend')
            qt_api = self.get_option('qt/api')
            if qt_api not in ('pyqt', 'pyside', 'pyqt5'):
                qt_api = None
            merge_output_channels = self.get_option('merge_output_channels')
            colorize_sys_stderr = self.get_option('colorize_sys_stderr')
            umr_enabled = CONF.get('main_interpreter', 'umr/enabled')
            umr_namelist = CONF.get('main_interpreter', 'umr/namelist')
            umr_verbose = CONF.get('main_interpreter', 'umr/verbose')
            ar_timeout = CONF.get('variable_explorer', 'autorefresh/timeout')
            ar_state = CONF.get('variable_explorer', 'autorefresh')

            sa_settings = None
            shellwidget = ExternalPythonShell(self, fname, wdir,
                           interact, debug, post_mortem=post_mortem,
                           path=pythonpath,
                           python_args=python_args,
                           arguments=args, stand_alone=sa_settings,
                           pythonstartup=pythonstartup,
                           pythonexecutable=pythonexecutable,
                           external_interpreter=external_interpreter,
                           umr_enabled=umr_enabled, umr_namelist=umr_namelist,
                           umr_verbose=umr_verbose, ets_backend=ets_backend,
                           monitor_enabled=monitor_enabled,

def apply_settings(self):
        """Apply settings changed in 'Preferences' dialog box"""
        qapp = QApplication.instance()
        # Set 'gtk+' as the default theme in Gtk-based desktops
        # Fixes Issue 2036
        if is_gtk_desktop() and ('GTK+' in QStyleFactory.keys()):
            try:
                qapp.setStyle('gtk+')
            except:
                pass
        else:
            qapp.setStyle(CONF.get('main', 'windows_style',
                                   self.default_style))
        
        default = self.DOCKOPTIONS
        if CONF.get('main', 'vertical_tabs'):
            default = default|QMainWindow.VerticalTabs
        if CONF.get('main', 'animated_docks'):
            default = default|QMainWindow.AnimatedDocks
        self.setDockOptions(default)

        self.apply_panes_settings()
        self.apply_statusbar_settings()
        
        if CONF.get('main', 'use_custom_caret_blinking') is True:
            qapp.setCursorFlashTime(CONF.get('main', 'custom_caret_blinking'))
        else:
            qapp.setCursorFlashTime(QApplication.cursorFlashTime())

mpl_backend = backends[backend_o]

        # Automatically load Pylab and Numpy, or only set Matplotlib
        # backend
        autoload_pylab_o = CONF.get('ipython_console', 'pylab/autoload')
        if autoload_pylab_o:
            spy_cfg.IPKernelApp.exec_lines.append(
                                              "%pylab {0}".format(mpl_backend))
        else:
            spy_cfg.IPKernelApp.exec_lines.append(
                                         "%matplotlib {0}".format(mpl_backend))

        # Inline backend configuration
        if mpl_backend == 'inline':
            # Figure format
            format_o = CONF.get('ipython_console',
                                'pylab/inline/figure_format', 0)
            formats = {0: 'png', 1: 'svg'}
            spy_cfg.InlineBackend.figure_format = formats[format_o]

            # Resolution
            if is_module_installed('ipykernel', '<4.5'):
                dpi_option = 'savefig.dpi'
            else:
                dpi_option = 'figure.dpi'

            spy_cfg.InlineBackend.rc = {'figure.figsize': (6.0, 4.0),
                                        dpi_option: 72,
                                        'font.size': 10,
                                        'figure.subplot.bottom': .125,
                                        'figure.facecolor': 'white',
                                        'figure.edgecolor': 'white'}

def load_last_visible_toolbars(self):
        """Loads the last visible toolbars from the .ini file."""
        toolbars_names = CONF.get('main', 'last_visible_toolbars', default=[])

        if toolbars_names:
            dic = {}
            for toolbar in self.toolbarslist:
                dic[toolbar.objectName()] = toolbar

            toolbars = []
            for name in toolbars_names:
                if name in dic:
                    toolbars.append(dic[name])
            self.visible_toolbars = toolbars
        else:
            self.get_visible_toolbars()
        self._update_show_toolbars_action()

def apply_statusbar_settings(self):
        """Update status bar widgets settings"""
        show_status_bar = CONF.get('main', 'show_status_bar')
        self.statusBar().setVisible(show_status_bar)

        if show_status_bar:
            for widget, name in ((self.mem_status, 'memory_usage'),
                                 (self.cpu_status, 'cpu_usage')):
                if widget is not None:
                    widget.setVisible(CONF.get('main', '%s/enable' % name))
                    widget.set_interval(CONF.get('main', '%s/timeout' % name))
        else:
            return