import asyncio
import asyncpio

class button:
    def __init__(self, pi, gpio, callback):
        self.pi = pi
        self.gpio = gpio
        self.callback = callback
    async def start(self):
        await self.pi.set_mode(self.gpio, asyncpio.INPUT)
        await self.pi.set_pull_up_down(self.gpio, asyncpio.PUD_UP)
        self.pi.set_glitch_filter(self.gpio, 20000)
        self.cb = await self.pi.callback(self.gpio, asyncpio.EITHER_EDGE, self.callback)