请问树莓派py能写一个gpio一键恢复系统的功能吗？

能。把它写入开机启动项就好了。
import RPi.GPIO as GPIO
import time
import os,sys
import signal

GPIO.setmode(GPIO.BCM)

#define GPIO pin
pin_btn=7
pin_led=17

GPIO.setup(pin_btn, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(pin_led, GPIO.OUT, initial=GPIO.LOW)

press_time=0
count_down=10
led_on=1

def cleanup():
    '''释放资源，不然下次运行是可能会收到警告
    '''
    print('clean up')
    GPIO.cleanup()

def handleSIGTERM(signum, frame):
    #cleanup()
    sys.exit()#raise an exception of type SystemExit

def onPress(channel):
    global press_time,count_down
    print('pressed')
    press_time+=1
    if press_time >3:
        press_time=1
    if press_time==1:
        GPIO.output(pin_led, 1)
        print('system will restart in %s'%(count_down))
    elif press_time==2:
        print('system will halt in %s'%(count_down))
    elif press_time==3:
        GPIO.output(pin_led, 0)