nltk_normalization.py 文件源码

def install_nltk_corpora(*packages):
        nltk_packages = list(packages)
        try:
            installed = (set(os.listdir(nltk.data.find("corpora"))) |
                         (set(os.listdir(nltk.data.find("taggers"))))) | \
                        (set(os.listdir(nltk.data.find("tokenizers"))))
        except LookupError:
            installed = set()
        if not set(nltk_packages) <= set(installed):
            nltk.download(nltk_packages)