Function is doesnt run

I want to if click to 1 insert 1 in Text.

Sample:
Click 1=> Text1
Click 2=> Text11

local druid = require("druid.druid")
local input = require("druid.extended.input")
druid.register("input", input)

local inputa
local yazi

local function usual_callback()
	inputa.set_text(inputa, "Text")
end

function init(self)
	msg.post(".", "acquire_input_focus")
	self.druid = druid.new(self)
	self.druid:new_button("button_1", usual_callback)
	inputa = self.druid:new_input("input_box_numpad", "input_text_numpad", gui.KEYBOARD_TYPE_NUMBER_PAD)
end

function final(self)
	self.druid:final()
end


function update(self, dt)
	self.druid:update(dt)
end


function on_message(self, message_id, message, sender)
	self.druid:on_message(message_id, message, sender)
end


function on_input(self, action_id, action)
	print("Corretc")
	return self.druid:on_input(action_id, action)
end