擅长:python、mysql、java
<pre><code>print("Please enter a sentence")
sentence=input()
lowersen=(sentence.lower())
print(lowersen)
splitlowersen=(lowersen.strip())
#to remove punctuations
splitlowersen = "".join(c for c in splitlowersen if c not in ('!','.',':'))
print("Enter word")
word=input()
lword=(word.lower())
if lword in splitlowersen:
print(lword, "is in sentence")
for i, j in enumerate (splitlowersen):
if j==lword:
print(""+lword+"","is in position", i+1)
if lword not in splitlowersen:
print (lword, "is not in sentence")
</code></pre>
<p>输出:</p>
<pre><code>Please enter a sentence
hello, friend
hello, friend
Enter word
hello
hello is in sentence
</code></pre>