返回功能外出錯，但打印工作正常

Question

以下是我的代碼。我想在其他函數中使用finalList，所以我試圖返回finalList，但我得到一個錯誤「返回」外部函數。
如果我使用print finalList，它打印結果很好。

不知道該怎麼辦？

import csv 
from featureVector import getStopWordList 
from preprocess import processTweet 
from featureVector import getFeatureVector 

inpTweets = csv.reader(open('sampleTweets.csv', 'rb'), delimiter=',', quotechar='|') 
stopWords = getStopWordList('stopwords.txt') 
featureList = [] 
tweets = [] 
for row in inpTweets: 
    sentiment = row[0] 
    tweet = row[1] 
    processedTweet = processTweet(tweet) 
    featureVector = getFeatureVector(processedTweet) 
    featureList.extend(featureVector) 
    tweets.append((featureVector, sentiment)); 

finalList = list(set(featureList)) 

Answer 1

我想用finalList在其他一些功能

你已經可以做到這一點。

# other code... 
finalList = list(set(featureList)) # this is global 

def foo(): 
    print(finalList) 

foo() 

---

外功能

如果你想return finalList '迴歸'，然後做一個功能它。

def getFinalList(): 
    # other code... 
    return list(set(featureList)) 

選項1

def foo(): 
    final_list = getFinalList() 
    print(final_list) 

foo() 

選項2

def foo(final_list): 
    print(final_list) 

foo(getFinalList())