python正則表達式*不是*字典中的東西*

Question

說我有以下的解釋：

d = {"word1":0, "word2":0} 

對於這個正則表達式，我需要驗證串一句話不在字典中的關鍵。

爲了正則表達式的目的，是否可以在字典中設置變量爲而不是？

Answer 1

>>> d = {"foo":0, "spam":0} 
>>> test = "This is a string with many words, including foo and bar" 
>>> any(word in d for word in test.split()) 
True 

如果標點符號是一個問題（例如，"This is foo."不會發現foo這種方法），既然你說了你的話是字母數字，你也可以使用

>>> import re 
>>> test = "This is foo." 
>>> any(word in d for word in re.findall("[A-Za-z0-9]+", test)) 

Answer 2

忘記正則表達式在這種情況下：

test = "word1 word2 word3"  # your string 
words = test.split(' ')  # words in your string 
dict = {"word1":0, "word2":0} # your dict  
for word in words: 
    if word in dict: 
     print word, "is a key in dict" 
    else: 
     print word, "isn't a key in dict"