蟒蛇，while循環，P值

Question

我無法調試這個程序，它計算了許多鳴叫的P值：

db = connection.data 
shows = db.individual 

def pvalue(): 
    #p-values of total tweets 
    show_records = sorted([(m['total_tweets'], m) for m in db.individual.find()]) 

    index=0 
    while index < len(show_records):  
     show = show_records[index] 
     tweet_pvalue = 1 - (index + 1.0)/len(show_records) 
     total=show['total_tweets'] 
     shows.update({"id": show[1]["id"]}, {'$set':{"pvalue_total_tweets":tweet_pvalue}}) 

    #need to remove several occurences of the same number of tweets to not false the p-value. 

     while show_records[index + 1]['total_tweets'] == total: #while next document has the same number of tweets 
      index+=1 
      show=show_records[index] 
      shows.update({"id": show[1]["id"]}, {'$set':{"pvalue_total_tweets":tweet_pvalue}}) 

它返回：

total=show['total_tweets'] 
TypeError: tuple indices must be integers, not str 

謝謝你這麼多你的幫助！

Answer 1

show_records = sorted([(m['total_tweets'], m) for m in db.individual.find()]) 

這將返回一個元組列表，如[(1, {'total_tweets': 1}), (2, {'total_tweets': 2}]。

而這一次

show = show_records[index] 

返回（例如，如果索引== 1） - (2, {'total_tweets': 2})，其是元組。而你正在嘗試做

(2, {'total_tweets': 2})['total_tweets'] 

它會導致錯誤。你應該寫：

(2, {'total_tweets': 2})[1]['total_tweets']