2016-09-23 40 views
-2

我正在复制书"21 recipes for mining Twitter"中的一个配方。 尽管我已经复制并粘贴了代码,但我收到了一个我不明白的错误。我不明白错误:列表索引超出范围

这里去的代码

import sys 
import twitter 
from recipe_make_twitter_request import make_twitter_request 
import functools 

SCREEN_NAME = sys.argv[1] 
MAX_IDS = int(sys.argv[2]) 

if __name__ == '__main__': 

    # Not authenticating lowers your rate limit to 150 requests per hr. 
    # Authenticate to get 350 requests per hour. 

    t = twitter.Twitter(domain='api.twitter.com', api_version='1') 

    # You could call make_twitter_request(t, t.friends.ids, *args, **kw) or 
    # use functools to "partially bind" a new callable with these parameters 

    get_friends_ids = functools.partial(make_twitter_request, t, t.friends.ids) 

    # XXX: Ditto if you want to do the same thing to get followers... 

    # get_followers_ids = functools.partial(make_twitter_request, t, t.followers.ids) 

    cursor = -1 
    ids = [] 
    while cursor != 0: 

     # Use make_twitter_request via the partially bound callable... 

     response = get_friends_ids(screen_name=SCREEN_NAME, cursor=cursor) 
     ids += response['ids'] 
     cursor = response['next_cursor'] 

     print >> sys.stderr, 'Fetched %i total ids for %s' % (len(ids), SCREEN_NAME) 

     # Consider storing the ids to disk during each iteration to provide an 
     # an additional layer of protection from exceptional circumstances 

     if len(ids) >= MAX_IDS: 
      break 

    # Do something useful with the ids like store them to disk... 

    print ids 

当我运行它,我得到一个:

list index out of range

上SCREEN_NAME

在事实,sys.argv中刚刚1对应的脚本名称项目:

sys.argv[1] 
[u'/Users/massimo/Desktop/Twitter/recipe_get_friends_followers.py'] 

我的理解是,SCREEN_NAME应该包含我想从提取的追随者的Twitter的名称。 MAX_IDS应该是我想要获得的最多关注者人数。

但是,我该如何指定这样的参数?目前,他们不应该包含在argv列表中。

+1

你是如何运行此脚本的最大数目取代some_user与期望的Twitter帐号,并max_ids? –

+1

你应该从终端运行脚本为'python script.py%screen_name%%max_ids%' –

+1

如果'sys.argv'只有一个项目,它是脚本名称,它将不会有一个元素'1'_ 。您的示例输出显示'sys.argv [1]'是脚本名称,因此无法帮助您解决问题并为您提供帮助。 – TigerhawkT3

回答

1

从终端,像这样运行脚本:

python script.py some_user max_ids 

当然,与追随者

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