Here Number Two

#!/usr/bin/python3

from flask import Flask, render_template
import Adafruit_BBIO.GPIO as GPIO
import Adafruit_BBIO.PWM as PWM
from time import sleep

class Motor:
    def __init__(self, dir_pin, pwm_pin, pwm_freq):
        self.dir_pin = dir_pin
        self.pwm_pin = pwm_pin
        self.value = 0

        PWM.start(pwm_pin, 0, pwm_freq)
        GPIO.setup(dir_pin, GPIO.OUT)

    def set(self, value):
        if value == self.value:
            return

        assert -100 <= value <= 100

        if (value < 0) != (self.value < 0):
            # changing direction
            PWM.set_duty_cycle(self.pwm_pin, 0)
            GPIO.output(self.dir_pin, value < 0)

        PWM.set_duty_cycle(self.pwm_pin, abs(value))
        self.value = value

motor1 = Motor(dir_pin="P8_18", pwm_pin="P9_16", pwm_freq=1000)
# motor2 = Motor(dir_pin="P8_16", pwm_pin="P9_14", pwm_freq=1000)
# motor3 = Motor(dir_pin="P8_14", pwm_pin="P8_13", pwm_freq=1000)
# motor4 = Motor(dir_pin="P8_26", pwm_pin="P8_19", pwm_freq=1000)

def set_motorOne(v1):
    motor1.set(v1)

...

v1("0",   0)
v1('40', 40)
v1('50', 50)

...