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![1 def add_mention_exclusive (valid_tweet, tweet_word): Python 3.7.4 (default, Jul 9 [GCC 6.3.0 20170516] on linux Go Raptors!](http://img.homeworklib.com/questions/9748a0b0-88f8-11eb-b707-a55c81b6d87b.png?x-oss-process=image/resize,w_560)
def add_mention_exclusive(valid_tweet, tweet_word):
if '@' + tweet_word in valid_tweet:
return valid_tweet
else:
return valid_tweet + ' @' + tweet_word
print(add_mention_exclusive('Go Raptors!', 'Raptors'))
print(add_mention_exclusive('Go @Raptors!', 'Raptors'))
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