%%javascript

IPython.keyboard_manager.command_shortcuts.add_shortcut('r', {
    help : 'run cell',
    help_index : 'zz',
    handler : function (event) {
        IPython.notebook.execute_cell();
        return false;
    }}
);

%%javascript

IPython.keyboard_manager.command_shortcuts.add_shortcut('r', function (event) {
    IPython.notebook.execute_cell();
    return false;
});

%%javascript

IPython.keyboard_manager.command_shortcuts.remove_shortcut('r');