How to use the ipykernel.connect.get_connection_file function in ipykernel

This is used for instance if glue has been started from IPython.

    Keyword arguments will be added to the namespace of the shell.

    Parameters
    ----------
    console_class : `type`
        The class of the console widget to create
    """

    shell = get_ipython()

    if shell is None:
        raise RuntimeError("There is no IPython kernel in this process")

    client = QtKernelClient(connection_file=get_connection_file())
    client.load_connection_file()
    client.start_channels()

    control = console_class()
    control.kernel_client = client
    control.shell = shell
    control.shell.user_ns.update(**kwargs)

    return control

self.shell = kernel_manager.kernel.shell
            self.push = self.shell.push
        elif isinstance(shell, TerminalInteractiveShell):
            # if launching from an ipython terminal then adding a console is
            # not supported. Instead users should use the ipython terminal for
            # the same functionality.
            self.kernel_client = None
            self.kernel_manager = None
            self.shell = None
            self.push = lambda var: None

        elif isinstance(shell, ZMQInteractiveShell):
            # if launching from jupyter notebook, connect to the existing
            # kernel
            kernel_client = QtKernelClient(
                connection_file=get_connection_file()
            )
            kernel_client.load_connection_file()
            kernel_client.start_channels()

            self.kernel_manager = None
            self.kernel_client = kernel_client
            self.shell = shell
            self.push = self.shell.push
        else:
            raise ValueError(
                'ipython shell not recognized; ' f'got {type(shell)}'
            )
        # Add any user variables
        user_variables = user_variables or {}
        self.push(user_variables)

def connected_console(console_class=RichIPythonWidget, **kwargs):
    """Create a console widget, connected to another kernel running in
       the current process

    This only works on IPython v1.0 and above

    Parameters:
        console_class : The class of the console widget to create
        kwargs : Extra variables to put into the namespace
    """
    shell = get_ipython()
    if shell is None:
        raise RuntimeError("There is no IPython kernel in this process")

    client = QtKernelClient(connection_file=get_connection_file())
    client.load_connection_file()
    client.start_channels()

    control = console_class()
    control.kernel_client = client
    control.shell = shell
    control.shell.user_ns.update(**kwargs)
    return control