输入一个字符串，并使用NLP Python将每个单词与给定的单词进行比较

import nltk
from nltk.tokenize import word_tokenize
from nltk.corpus import stopwords

input_string = "This is an example string."
given_word = "example"

tokens = word_tokenize(input_string)

stop_words = set(stopwords.words('english'))
filtered_tokens = [token for token in tokens if token.lower() not in stop_words]

matches = [token for token in filtered_tokens if token.lower() == given_word.lower()]

if len(matches) > 0:
    print("与给定的单词匹配的单词有：")
    for match in matches:
        print(match)
else:
    print("没有与给定的单词匹配的单词。")