NLTK下载punkt

from nltk import word_tokenizesents = [sent1, sent2]
print(word_tokenize(sent1))

报错：

D:\Anaconda3\python.exe "D:/002 知识总结/007 NLP/NLP入门文章/词袋模型与句子相似度.py"
[nltk_data] Error loading punkt: <urlopen error [SSL:
[nltk_data]     CERTIFICATE_VERIFY_FAILED] certificate verify failed:
[nltk_data]     unable to get local issuer certificate (_ssl.c:1123)>
Traceback (most recent call last):File "D:/002 知识总结/007 NLP/NLP入门文章/词袋模型与句子相似度.py", line 11, in <module>print(word_tokenize(sent1))File "D:\Anaconda3\lib\site-packages\nltk\tokenize\__init__.py", line 129, in word_tokenizesentences = [text] if preserve_line else sent_tokenize(text, language)File "D:\Anaconda3\lib\site-packages\nltk\tokenize\__init__.py", line 106, in sent_tokenizetokenizer = load("tokenizers/punkt/{0}.pickle".format(language))File "D:\Anaconda3\lib\site-packages\nltk\data.py", line 752, in loadopened_resource = _open(resource_url)File "D:\Anaconda3\lib\site-packages\nltk\data.py", line 877, in _openreturn find(path_, path + [""]).open()File "D:\Anaconda3\lib\site-packages\nltk\data.py", line 585, in findraise LookupError(resource_not_found)
LookupError: 
**********************************************************************Resource punkt not found.Please use the NLTK Downloader to obtain the resource:>>> import nltk>>> nltk.download('punkt')For more information see: https://www.nltk.org/data.htmlAttempted to load tokenizers/punkt/english.pickleSearched in:- 'C:\\Users\\29617/nltk_data'- 'D:\\Anaconda3\\nltk_data'- 'D:\\Anaconda3\\share\\nltk_data'- 'D:\\Anaconda3\\lib\\nltk_data'- 'C:\\Users\\29617\\AppData\\Roaming\\nltk_data'- 'C:\\nltk_data'- 'D:\\nltk_data'- 'E:\\nltk_data'- ''
**********************************************************************进程已结束，退出代码为 1