函數回調循環2次

Question

def callback(channel):
    print("WARNING! FLAME DETECTED!!!\n")
    pygame.mixer.music.play()
    firebase.post("/Report/Location", alamat)
    firebase.post("/Report/Time", masa)
    lcd_string("  FIRE DETECTED  ",LCD_LINE_1)
    lcd_string(masa,LCD_LINE_2)
    print ("SUCCESSFULL REPORTED\n" +"Time : " + masa + "\nLocation : " + alamat)   


GPIO.add_event_detect(channel, GPIO.FALLING, bouncetime=300)  # let us know when the pin goes HIGH or LOW

GPIO.add_event_callback(channel, callback)  # assign function to GPIO PIN, Run function on change



# infinite loop

while True:

    time.sleep(10)
    lcd_init()

您好，有人可以解釋一下為什么上面的這段代碼會循環兩次功能。 當我移走時，這讓我更加困惑

firebase.post("/Report/Location", alamat)
firebase.post("/Report/Time", masa)

該代碼不會循環該函數。

Answer 1

據我所知，當解釋器讀取exit（）語句時，它會跳出無限循環，並終止程序執行。