安裝nltk遇到的坑：下載失敗+安裝成功但導入不了

在jupyter notebook上運行代碼時：html import nltk paragraph = "i am a good boy ! are you ok? hahaha i am fine" words_list = nltk.word_tokenize(paragraph) print(words_list) 出現錯誤：python ModuleNotFoundError

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