如何在不使用python替換方法的情況下替換句子中的單詞

Question

我已經寫了一個函數來替換句子中的單詞，而不使用替換方法中的python，問題是我的代碼在邊緣情況下失敗單詞與另一個詞相結合，我想可能會替換每一個可能的事件。看看我的代碼

def replace_all (target,find,replace): 
       split_target = target.split() 
       result = '' 
       for i in split_target: 
         if i == find: 
           i = replace 
         result += i + ' ' 
       return result.strip() 
      target = "Maybe she's born with it. Maybe it's Maybeline." 
      find = "Maybe" 
      replace = "Perhaps" 
      print replace_all(target, find, replace) 

輸出爲：

Perhaps she's born with it. Perhaps it's Maybeline. 

，但我希望它打印：

Perhaps she's born with it. Perhaps it's perhapsline. 

公告的最後一句話是maybeline是假設改變或許線。我已經與此戰鬥了一週，任何幫助將不勝感激。

Answer 1

的原因是，你在拆分的空白，所以，當你比較i到find，你比較Maybeline.到Maybe。這不匹配，所以你沒有取代那個事件。

如果您由你正在尋找替代的價值分裂，然後再加入與替換字符串的部分，你會得到一個數，其中Maybe曾經是字符串，分裂的，你可以加入這些與它們之間的字符串爲replace：

def replace_all (target,find,replace): 
    return replace.join(target.split(find)) 

target = "Maybe she's born with it. Maybe it's Maybeline." 
find = "Maybe" 
replace = "Perhaps" 

print(replace_all(target, find, replace)) 

> Perhaps she's born with it. Perhaps it's Perhapsline.