I found a error starting test.py script from this repo because this script have to run MQ2.py (this is sensor I use in my case) and BaseMQ.py from same root folder. I use ESP8266 Lolin microcontroller with Micropython framework. test.py have to be modify to work as this:

Test for MQ-series drivers

from MQ2 import MQ2 import utime

class App: def init(self, pin = 0): self.sensor = MQ2(pinData = pin, baseVoltage = 3.3)

def Run(self):
	print("Calibrating")
	self.sensor.calibrate()
	print("Calibration completed")
	print("Base resistance:{0}".format(self.sensor._ro))
	while True:
		print("Smoke: {0}".format(self.sensor.readSmoke()))
		print("LPG: {0}".format(self.sensor.readLPG()))
		print("Methane: {0}".format(self.sensor.readMethane()))
		print("Hydrogen: {0}".format(self.sensor.readHydrogen()))
		utime.sleep(5)

App().Run()