如果出错,如何重新启动tweepy脚本？

Question

我有一个python脚本,可以将与跟踪关键字相关的推文连续存储到文件中.但是,由于下面附加了错误,脚本会反复崩溃.如何编辑脚本以便自动重新启动？我见过很多解决方案,包括这个(异常后重启程序),但我不知道如何在我的脚本中实现它.

import sys
import tweepy
import json
import os

consumer_key=""
consumer_secret=""
access_key = ""
access_secret = ""

auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_key, access_secret)
api = tweepy.API(auth)
# directory that you want to save the json file
os.chdir("C:\Users\json_files")
# name of json file you want to create/open and append json to
save_file = open("12may.json", 'a')

class CustomStreamListener(tweepy.StreamListener):
    def __init__(self, api):
        self.api = api
        super(tweepy.StreamListener, self).__init__()

        # self.list_of_tweets = []

    def on_data(self, tweet):
        print tweet
        save_file.write(str(tweet))

    def on_error(self, status_code):
        print >> sys.stderr, 'Encountered error with status code:', status_code
        return True # Don't kill the stream
        print "Stream restarted"

    def on_timeout(self):
        print >> sys.stderr, 'Timeout...'
        return True # Don't kill the stream
        print "Stream restarted"

sapi = tweepy.streaming.Stream(auth, CustomStreamListener(api))
sapi.filter(track=["test"])

================================================== =========================

Traceback (most recent call last):
  File "C:\Users\tweets_to_json.py", line 41, in <module>
    sapi.filter(track=["test"])
  File "C:\Python27\lib\site-packages\tweepy-2.3-py2.7.egg\tweepy\streaming.py", line 316, in filter
    self._start(async)
  File "C:\Python27\lib\site-packages\tweepy-2.3-py2.7.egg\tweepy\streaming.py", line 235, in _start
    self._run()
  File "C:\Python27\lib\site-packages\tweepy-2.3-py2.7.egg\tweepy\streaming.py", line 165, in _run
    self._read_loop(resp)
  File "C:\Python27\lib\site-packages\tweepy-2.3-py2.7.egg\tweepy\streaming.py", line 206, in _read_loop
    for c in resp.iter_content():
  File "C:\Python27\lib\site-packages\requests-1.2.3-py2.7.egg\requests\models.py", line 541, in generate
    chunk = self.raw.read(chunk_size, decode_content=True)
  File "C:\Python27\lib\site-packages\requests-1.2.3-py2.7.egg\requests\packages\urllib3\response.py", line 171, in read
    data = self._fp.read(amt)
  File "C:\Python27\lib\httplib.py", line 543, in read
    return self._read_chunked(amt)
  File "C:\Python27\lib\httplib.py", line 603, in _read_chunked
    value.append(self._safe_read(amt))
  File "C:\Python27\lib\httplib.py", line 660, in _safe_read
    raise IncompleteRead(''.join(s), amt)
IncompleteRead: IncompleteRead(0 bytes read, 1 more expected)

Answer 1

通过为流编写新函数,找出如何合并while/try循环:

def start_stream():
    while True:
        try:
            sapi = tweepy.streaming.Stream(auth, CustomStreamListener(api))
            sapi.filter(track=["Samsung", "s4", "s5", "note" "3", "HTC", "Sony", "Xperia", "Blackberry", "q5", "q10", "z10", "Nokia", "Lumia", "Nexus", "LG", "Huawei", "Motorola"])
        except: 
            continue

start_stream()

我通过使用CMD + C手动中断程序来测试自动重启.尽管如此,很高兴听到更好的方法来测试这样的功能.

Answer 2

我最近发生了这个问题，想分享更多关于它的详细信息。

导致它的错误是因为选择的流过滤器太广泛了test。因此，您以比您可以接受的速度更快的速度接收流，这会导致IncompleRead错误。

这可以通过优化搜索或使用更具体的异常来解决：

from http.client import IncompleteRead
...
try:
    sapi = tweepy.streaming.Stream(auth, CustomStreamListener(api))
    sapi.filter(track=["test"])
except IncompleRead:
    pass