Method register

IPython/core/events.py:62–83

Register a new event callback. Parameters ---------- event : str The event for which to register this callback. function : callable A function to be called on the given event. It should take the same parameters as the appropriate c

(self, event: str, function: Callable[..., Any])

        self.print_on_error = print_on_error
    
    def register(self, event: str, function: Callable[..., Any]) -> None:
        """Register a new event callback.

        Parameters
        ----------
        event : str
            The event for which to register this callback.
        function : callable
            A function to be called on the given event. It should take the same
            parameters as the appropriate callback prototype.

        Raises
        ------
        TypeError
            If ``function`` is not callable.
        KeyError
            If ``event`` is not one of the known events.
        """
        if not callable(function):
            raise TypeError('Need a callable, got %r' % function)
        if function not in self.callbacks[event]:
            self.callbacks[event].append(function)
    
    def unregister(self, event: str, function: Callable[..., Any]) -> None:
        """Remove a callback from the given event."""