2016-09-23 59 views
-2

我正在複製書"21 recipes for mining Twitter"中的一個配方。 儘管我已經複製並粘貼了代碼,但我收到了一個我不明白的錯誤。我不明白錯誤:列表索引超出範圍

這裏去的代碼

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 

當我運行它,我得到一個:

list index out of range

上SCREEN_NAME

在事實,sys.argv中剛剛1對應的腳本名稱項目:

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

我的理解是,SCREEN_NAME應該包含我想從提取的追隨者的Twitter的名稱。 MAX_IDS應該是我想要獲得的最多關注者人數。

但是,我該如何指定這樣的參數?目前,他們不應該包含在argv列表中。

+1

你是如何運行此腳本的最大數目取代some_user與期望的Twitter帳號,並max_ids? –

+1

你應該從終端運行腳本爲'python script.py%screen_name%%max_ids%' –

+1

如果'sys.argv'只有一個項目,它是腳本名稱,它將不會有一個元素'1'_ 。您的示例輸出顯示'sys.argv [1]'是腳本名稱,因此無法幫助您解決問題併爲您提供幫助。 – TigerhawkT3

回答

1

從終端,像這樣運行腳本:

python script.py some_user max_ids 

當然,與追隨者

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