range.py

#! /usr/bin/env python3                                         

def find_duplicate(vbt_min, pwm_max):
    prev = -1
    pwm_min = round(vbt_min * pwm_max / 255)
    print("sysfs : PWM")
    print("-----------")
    for i in range(pwm_max + 1):
        pwm = round(i * (pwm_max - pwm_min) / pwm_max + pwm_min)
        if prev == pwm:
            print(" %3d -> %3d" % (i - 1, pwm))
            print(" %3d -> %3d" % (i, pwm))
        prev = pwm

if __name__ == '__main__':
    find_duplicate(10, 937)