连接错误：因连接方在超时时间内未正确响应而导致连接尝试失败

Question

我正在用Python开发一些软件，利用Steam的API。我使用Flask来运行和测试我的Python代码。一切都很顺利，但现在我遇到了一个错误（我没有改过任何代码）：

('连接中断。', error(10060, '连接尝试失败，因为连接方在一段时间后没有正确响应，或者已建立的连接因为连接的主机没有响应而失败'))

我不知道为什么会出现这个错误，因为代码之前运行得很好，突然就出现了这个错误，而且我没有改动过代码、电脑或Flask。

代码如下：

import urllib
import itertools
import urllib2
import time
from datetime import datetime
from bs4 import BeautifulSoup
from flask import Flask
import requests
import json
import xml.etree.ElementTree as ET
from xml.dom.minidom import parseString
import sys


app = Flask(__name__)
API_KEY = 'XXX'
API_BASEURL = 'http://api.steampowered.com/'
API_GET_FRIENDS = API_BASEURL + 'ISteamUser/GetFriendList/v0001/?key='+API_KEY+'&steamid='
API_GET_SUMMARIES = API_BASEURL + 'ISteamUser/GetPlayerSummaries/v0002/?key='+API_KEY+'&steamids='
PROFILE_URL = 'http://steamcommunity.com/profiles/'
steamIDs = []
myFriends = []

class steamUser:
    def __init__(self, name, steamid, isPhisher):
        self.name = name
        self.steamid = steamid
        self.isPhisher = isPhisher

    def setPhisherStatus(self, phisher):
        self.isPhisher = phisher

@app.route('/DeterminePhisher/<steamid>')
def getFriendList(steamid):
    try:
        r = requests.get(API_GET_FRIENDS+steamid)
        data = r.json()
        for friend in data['friendslist']['friends']:
            steamIDs.append(friend['steamid'])
        return isPhisher(steamIDs)
    except requests.exceptions.ConnectionError as e:
        return str(e.message)

def isPhisher(ids):
    phisherusers = ''
    for l in chunksiter(ids, 50):
        sids = ','.join(map(str, l))
        try:
            r = requests.get(API_GET_SUMMARIES+sids)
            data = r.json();
            for i in range(len(data['response']['players'])):
                steamFriend = data['response']['players'][i]
                n = steamUser(steamFriend['personaname'], steamFriend['steamid'], False)
                if steamFriend['communityvisibilitystate'] and not steamFriend['personastate']:
                    url =  PROFILE_URL+steamFriend['steamid']+'?xml=1'
                    dat = requests.get(url)
                    if 'profilestate' not in steamFriend:
                        n.setPhisherStatus(True);
                        phisherusers = (phisherusers + ('%s is a phisher' % n.name) + ', ')
                    if parseString(dat.text.encode('utf8')).getElementsByTagName('privacyState'):
                        privacy = str(parseString(dat.text.encode('utf-8')).getElementsByTagName('privacyState')[0].firstChild.wholeText)
                        if (privacy == 'private'):
                            n.setPhisherStatus(True)
                            phisherusers = (phisherusers + ('%s is a phisher' % n.name) + ', ')
                elif 'profilestate' not in steamFriend:
                    n.setPhisherStatus(True);
                    phisherusers = (phisherusers + ('%s is a phisher' % n.name) + ', ')
                else:
                    steamprofile = BeautifulSoup(urllib.urlopen(PROFILE_URL+steamFriend['steamid']).read())
                    for row in steamprofile('div', {'class': 'commentthread_comment  '}):
                        comment = row.find_all('div', 'commentthread_comment_text')[0].get_text().lower()
                        if ('phisher' in comment) or ('scammer' in comment):
                            n.setPhisherStatus(True)
                            phisherusers = (phisherusers + ('%s is a phisher' % n.name) + ', ')
                myFriends.append(n);
        except requests.exceptions.ConnectionError as e:
            return str(e.message)
        except:
            return "Unexpected error:", sys.exc_info()[0]
    return phisherusers

def chunksiter(l, chunks):
    i,j,n = 0,0,0
    rl = []
    while n < len(l)/chunks:        
        rl.append(l[i:j+chunks])        
        i+=chunks
        j+=j+chunks        
        n+=1
    return iter(rl)

app.run(debug=True)

我想知道这个错误是什么意思，以及为什么会发生这种情况。提前谢谢大家的帮助。我非常感激。

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连接错误：因连接方在超时时间内未正确响应而导致连接尝试失败

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