將單詞添加到包含字符串中某些字母的列表中

Question

我有一個字符串，我想查找包含「th」的單詞並將它們添加到列表中。但我不想要一個包含'T'的單詞。

最終列表中不能有任何重複單詞。

thestring = "The character that can fire the. bullet that sheriff dodged" 
a = "th" 
b = "T" 

def makelists(thestring, a, b) 
    """ 
    >>> makelists(thestring, 'th', 'T') 
    ['that', 'the.'] 
    """ 

到目前爲止，我只有這個，它打印出重複的單詞。

def makelists(thestring, a, b) 
    words = thestring.split() 
    thelist = [] 
    for word in words: 
     if a in word: 
      thelist.append(word)   
    for char in thelist: 
     if b in char: 
      thelist.remove(char) 
    print thelist 

我得到的輸出是['that'，'the'，'that']。

什麼編輯可以做我的代碼爲這一個輸出爲[「那個」，「了。」]

Answer 1

雖然你的代碼很長，你必須優化它，你可以在添加前檢查名單： -

def makelists(thestring, a, b) 
    words = thestring.split() 
    thelist = [] 
    for word in words: 
     if a in word and word not in thelist: 
      thelist.append(word)   
    for char in thelist: 
     if b in char: 
      thelist.remove(char) 
    print thelist 

或者其他的解決辦法是要做到： -

thelist = list(set(thelist)) 

Answer 2

使用一組，你甚至可以縮短代碼有更好的，如果聲明：

def makelists(thestring, a, b): 
    words = thestring.split() 
    thelist = set([]) 
    for word in words: 
     if a in word and b not in word: 
      thelist.add(word)   
    print thelist 

Answer 3

嘗試使用re模塊和列表理解是這樣的：

import re 
thestring = "The character that can fire the. bullet that sheriff dodged"  
a = "th" 
b = "T" 

print list(set([word for word in re.split(" +", thestring) if a in word and b not in word ]))