變化，並通過一個全局變量函數的Python

Question

我有一個遞歸函數如下這改變了全局變量，但似乎我不能改變全局變量傳遞給遞歸函數，因爲錯誤異常說：

File "forlooptest.py", line 18, in get_final_list 
     wordList.remove(w) 
     ValueError: list.remove(x): x not in list 

我認爲list.remove(x): x not in list是因爲全局變量沒有被改變。

有誰能告訴我我該怎麼做？謝謝！

import wordNet 
import copy 
from __builtin__ import any as b_any 

final_list = [] 
wrec = 'start' 

def get_final_list(wordList, w): 

'''functions for get the sematically linked words list 
    traverse and check every word then append to final_list''' 

final_list.append(w) 
hyplst = wordNet.gethypSet(w) 
hyperlst = wordNet.gethyperSet(w) 
wordList.remove(w) 
for word in wordList: 
      if (word in hyplst 
       or word in hyperlst 
       or b_any(word in x for x in hyplst) 
       or b_any(word in x for x in hyperlst)): 
       global wrec 
       wrec = word 
       break 

get_final_list(wordList, wrec) 

return final_list 

Answer 1

您的問題與全球無關。如果沒有符合條件的單詞，則只需執行相同的遞歸調用，從而再次刪除wrec。