擅长:python、mysql、java
<p>你在循环原句中的字符,而不是你创建的单词列表。试试这个:</p>
<pre><code>sentence = input("Please enter a sentence: ")
validwords = ["hello","i","like","python"]
words = sentence.split(" ")
for word in words:
if word in validwords:
print ("I found a valid word: " + word)
else:
print ("I found an invalid word: " + word)
</code></pre>