为什么python会在失去互联网后退出

我目前正在开发的程序每5分钟从weather.com获取一次信息。我目前有一个与互联网丢失的问题，如果该程序试图检查更新它将退出该程序。检查internet错误并让其稍后重试的最佳方法是什么。这段代码现在是一个非常粗糙的模型，所以对于可读性很抱歉

RED_PIN = 17
GREEN_PIN = 22
BLUE_PIN = 24

import pigpio
import time
import pywapi
import string
import math

pi = pigpio.pi()
weather = 'none'
flashelse = 5

while weather != 'Exit':
    print time.ctime()
    #print time.strftime('%l:%M%p %z on %b %d, %Y')
    weather_com_result = pywapi.get_weather_from_weather_com('USTN0268')#USTN0268
    tempc = int(weather_com_result['current_conditions']['temperature'])
    tempf = (tempc*9/5) + 32
    weather = string.lower(weather_com_result['current_conditions']['text'])
    print "Weather.com says: It is " + string.lower(weather_com_result['current_conditions']['text']) + " and", tempf, "F now in Knoxville, TN."

    if weather == 'sunny':
        pi.set_PWM_dutycycle(RED_PIN, 224) 
        pi.set_PWM_dutycycle(GREEN_PIN, 255) 
        pi.set_PWM_dutycycle(BLUE_PIN, 0) 

    elif weather == 'Partly Cloudy':
        pi.set_PWM_dutycycle(RED_PIN, 0) 
        pi.set_PWM_dutycycle(GREEN_PIN, 255) 
        pi.set_PWM_dutycycle(BLUE_PIN, 25) 

    elif weather == 'cloudy':
        pi.set_PWM_dutycycle(RED_PIN, 82) 
        pi.set_PWM_dutycycle(GREEN_PIN, 0) 
        pi.set_PWM_dutycycle(BLUE_PIN, 255) 

    elif weather == 'rain shower':
        pi.set_PWM_dutycycle(RED_PIN, 0) 
        pi.set_PWM_dutycycle(GREEN_PIN, 0) 
        pi.set_PWM_dutycycle(BLUE_PIN, 255) 

    elif weather == 'Thunderstorm':
        pi.set_PWM_dutycycle(RED_PIN, 255) 
        pi.set_PWM_dutycycle(GREEN_PIN, 0) 
        pi.set_PWM_dutycycle(BLUE_PIN, 0) 

    elif weather == 'Snow':
        pi.set_PWM_dutycycle(RED_PIN, 0) 
        pi.set_PWM_dutycycle(GREEN_PIN, 174) 
        pi.set_PWM_dutycycle(BLUE_PIN, 255) 

    elif weather == 'Exit':
        break

    else:
        pi.set_PWM_dutycycle(RED_PIN, 50) 
        pi.set_PWM_dutycycle(GREEN_PIN, 0) 
        pi.set_PWM_dutycycle(BLUE_PIN, 0) 
        time.sleep(2)
        pi.set_PWM_dutycycle(RED_PIN, 0) 
        pi.set_PWM_dutycycle(GREEN_PIN, 0) 
        pi.set_PWM_dutycycle(BLUE_PIN, 0) 
    #text_file.close()
    time.sleep(300)

print("Exiting...")

time.sleep(.1)
pi.set_PWM_dutycycle(RED_PIN, 50) 
pi.set_PWM_dutycycle(GREEN_PIN, 0) 
pi.set_PWM_dutycycle(BLUE_PIN, 0) 

time.sleep(1)
pi.set_PWM_dutycycle(RED_PIN, 0)
pi.set_PWM_dutycycle(GREEN_PIN, 0)
pi.set_PWM_dutycycle(BLUE_PIN, 0)

pi.stop()

---

我不熟悉

pywapi

，但我猜

pywapi.get\u weather\u from\u weather\u com（）

会引发某种

SocketException

如果没有连接，那么应该用

try/except

来包装它

try:
    weather_com_result = pywapi.get_weather_from_weather_com('USTN0268')
except SocketException: # or what ever exception type ptwapi raises
    # probably log the exception for later review
    continue

---

您好，欢迎来到stackoverflow。为了吸引更好的答案，你应该减少你的样本程序，直到你得到一个显示问题的最小样本。在空白处签出此页是一个坏主意，如果您预计会出现套接字错误，您应该捕获“捕获所有”反模式的下一个，您可能希望在某个地方打印错误消息。@Padraiccningham同意，但由于我不熟悉

pywapi

我不希望OP使用它，我将编辑我的答案……如果您真的想继续发生任何事情（服务可以理解），最起码的是记录您不希望在程序失败时可以查看的异常。@spectras完全可以接受，但我不是来为OPs程序编写全部逻辑的：）