from prompt_toolkit.key_binding.bindings.named_commands import get_by_name
from prompt_toolkit.keys import Keys

@events.on_ptk_create
def custom_keybindings(bindings, **kw):
    @bindings.add(Keys.ControlW)
    def delete_word(event):
        get_by_name("backward-kill-word").call(event)

    @bindings.add(Keys.ControlX, Keys.ControlA)
    def select_all(event):
        buffer = event.current_buffer
        buffer.cursor_position = 0
        buffer.start_selection()
        buffer.selection_state.enter_shift_mode()
        buffer.cursor_position = len(buffer.text)