How to use qtconsole - 10 common examples

def __init__(
            self,
            history_widget: QtWidgets.QPlainTextEdit = None,
            *args,
            **kwargs
    ):
        """

        :param args:
        :param kwargs:
        """
        super().__init__(*args, **kwargs)
        self.history_widget = history_widget

        self.kernel_manager = kernel_manager = qtconsole.inprocess.QtInProcessKernelManager()
        kernel_manager.start_kernel()
        self.kernel_client = kernel_client = kernel_manager.client()
        kernel_client.start_channels()

        def stop():
            kernel_client.stop_channels()
            kernel_manager.shutdown_kernel()
            IPython.lib.guisupport.get_app_qt4().exit()

        self.exit_requested.connect(stop)
        self.width = kwargs.get(
            'width',
            chisurf.settings.gui['console']['width']
        )
        self._macro = ""
        self.recording = False

IPython.lib.guisupport.get_app_qt4().exit()

        self.exit_requested.connect(stop)
        self.width = kwargs.get(
            'width',
            chisurf.settings.gui['console']['width']
        )
        self._macro = ""
        self.recording = False

        # save nevertheless every inputs into a session file
        self.session_file = chisurf.settings.session_file
        #self.set_default_style(
        #    chisurf.settings.gui['console']['style']
        #)
        self.style_sheet = qtconsole.styles.default_light_style_sheet

def getKernelManager():
        """
        Returns a QtInProcessKernelManager, already initialized.

        :return: `qtconsole.inprocess.QtInProcessKernelManager`
        """
        kernel_manager = QtInProcessKernelManager()
        kernel_manager.start_kernel(show_banner=False)
        kernel_manager.kernel.gui = 'qt4'
        return kernel_manager

def __init__(
            self,
            history_widget: QtWidgets.QPlainTextEdit = None,
            *args,
            **kwargs
    ):
        """

        :param args:
        :param kwargs:
        """
        super().__init__(*args, **kwargs)
        self.history_widget = history_widget

        self.kernel_manager = kernel_manager = QtInProcessKernelManager()
        kernel_manager.start_kernel()
        self.kernel_client = kernel_client = kernel_manager.client()
        kernel_client.start_channels()

        def stop():
            kernel_client.stop_channels()
            kernel_manager.shutdown_kernel()
            guisupport.get_app_qt4().exit()

        self.exit_requested.connect(stop)
        self.width = kwargs.get(
            'width',
            mfm.settings.gui['console']['width']
        )
        self._macro = ""
        self.recording = False

def main():
    """Start kernel manager and client, create window, run app event loop,
    auto execute some code in user namespace. A minimalist example is shown in
    qt_ip_test.py.

    NOTE: Make sure that the Qt v2 API is being used by IPython by running `export
    QT_API=pyqt` at the command line before running neuropy, or by adding it to `.bashrc`"""
    app = guisupport.get_app_qt4()

    if INPROCESS:
        from qtconsole.inprocess import QtInProcessKernelManager
        km = QtInProcessKernelManager()
    else:
        from qtconsole.manager import QtKernelManager
        km = QtKernelManager()
    km.start_kernel()
    km.kernel.gui = 'qt4'
    kc = km.client()
    kc.start_channels()

    nw = NeuropyWindow()
    ipw = nw.ipw
    config_ipw(ipw)
    ipw.kernel_manager = km
    ipw.kernel_client = kc
    ipw.exit_requested.connect(nw.stop)
    nw.show()

if self.replace_tabs:
                chars = '    '
                indentation /= self.replace_tabs

            if line.endswith(':'):
                if self.replace_tabs:
                    indentation += 1

            super().keyPressEvent(e)
            self.insertPlainText(chars * int(indentation))
            
        else:
            super().keyPressEvent(e)


class ConsoleWidget(RichJupyterWidget, QThread):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.font_size = 12
        self.kernel_manager = kernel_manager = QtInProcessKernelManager()
        kernel_manager.start_kernel(show_banner=False)
        kernel_manager.kernel.gui = 'qt'
        self.kernel_client = kernel_client = self._kernel_manager.client()
        kernel_client.start_channels()

        def stop():
            kernel_client.stop_channels()
            kernel_manager.shutdown_kernel()
            sys.exit()

        self.exit_requested.connect(stop)

def __init__(self, *args, **kw):
        """
        :param start_on_init: (bool) If True (default), the kernel manager will
                              be initialized and the kernel threads will be
                              started

        .. note:: `TaurusConsole.__init__` also accepts all args and kwargs
                  of :class:`qtconsole.rich_jupyter_widget.RichJupyterWidget`

        """
        self.kernel_manager = None
        start_on_init = kw.pop('start_on_init', True)
        RichJupyterWidget.__init__(self, *args, **kw)
        if start_on_init:
            self.startKernelClient()

from qtconsole.inprocess import QtInProcessKernelManager
from IPython.core.magic import magic_escapes

from nexusformat.nexus import *

from .. import __version__
from .treeview import NXTreeView
from .plotview import NXPlotView
from .datadialogs import *
from .scripteditor import NXScriptWindow, NXScriptEditor
from .utils import confirm_action, report_error, display_message, is_file_locked
from .utils import natural_sort, import_plugin, timestamp
from .utils import get_name, get_colors, load_image


class NXRichJupyterWidget(RichJupyterWidget):

    def _is_complete(self, source, interactive=True):
        shell = self.kernel_manager.kernel.shell
        status, indent_spaces = shell.input_transformer_manager.check_complete(
                                    source)
        if indent_spaces is None:
            indent = ''
        else:
            indent = ' ' * indent_spaces
        return status != 'incomplete', indent


class MainWindow(QtWidgets.QMainWindow):

    _magic_menu_dict = {}

# qtpy must be the first import here as it makes the selection of the PyQt backend
# by preferring PyQt5 as we would like
from qtpy.QtWidgets import QApplication
try:
    # Later versions of Qtconsole are part of Jupyter
    from qtconsole.rich_jupyter_widget import RichJupyterWidget
    from qtconsole.inprocess import QtInProcessKernelManager
except ImportError:
    from IPython.qt.console.rich_ipython_widget import RichIPythonWidget as RichJupyterWidget
    from IPython.qt.inprocess import QtInProcessKernelManager

# local imports
from mantidqt.utils.asynchronous import BlockingAsyncTaskWithCallback


class InProcessJupyterConsole(RichJupyterWidget):

    def __init__(self, *args, **kwargs):
        """
        A constructor matching that of RichJupyterWidget
        :param args: Positional arguments passed directly to RichJupyterWidget
        :param kwargs: Keyword arguments. The following keywords are understood by this widget:

          - banner: Replace the default banner with this text
          - startup_code: A code snippet to run on startup. It is also added to the banner to inform the user.

        the rest are passed to RichJupyterWidget
        """
        banner = kwargs.pop("banner", "")
        startup_code = kwargs.pop("startup_code", "")
        super(InProcessJupyterConsole, self).__init__(*args, **kwargs)

def start_python_kernel(self):
        """Starts kernel manager and client and attaches
        the client to the Python Console."""
        self._kernel_starting = True
        km = QtKernelManager(kernel_name=self.kernel_name)
        try:
            blackhole = open(os.devnull, 'w')
            km.start_kernel(stdout=blackhole, stderr=blackhole)
            kc = km.client()
            kc.start_channels()
            self.kernel_manager = km
            self.kernel_client = kc
            self.connect_signals()
            return True
        except FileNotFoundError:
            self._toolbox.msg_error.emit("\tCouldn't find the Python executable specified by the Jupyter kernel")
            self._kernel_starting = False
            return False
        except NoSuchKernel:  # kernelspecs for the selected kernel_name not available
            self._toolbox.msg_error.emit(
                "\tCouldn't find the specified IPython kernel specs [{0}]".format(self.kernel_name)