限制輸入一個字

Question

因此，這裏是我的代碼：

sentence=input('Please input a sentence: ').lower() 
word=input('What word would you like to select? ').lower() 
words=sentence.split() 
for (A, keyword) in enumerate(words): 
    if(keyword==word): 
     print(A+1) 
if(keyword!=word): 
     print ('This word is not in the sentence') 

我需要將用戶輸入限制爲只有一個字，如果他們輸入2個字，如何將我去這個返回的錯誤信息？

Answer 1

檢查分割輸入的長度大於1：

word = input('What word would you like to select? ').lower() 
if len(word.split()) > 1: 
    raise Exception("Input must be a single word")