出于特定原因,我需要在 python 2.7 版本中安装 nltk 2.09b。但是每当我执行以下命令时,pip2 install nltk==2.0b9我收到以下错误:Collecting nltk==2.0b9 Using cached https://files.pythonhosted.org/packages/ea/b3/4c5157bf034437905fbbd3c80e58c8b4a22cf3400db0bdf19dae3079a732/nltk-2.0b9.tar.gz Complete output from command python setup.py egg_info: Traceback (most recent call last): File "<string>", line 1, in <module> IOError: [Errno 2] No such file or directory: '/private/var/folders/3b/yskb8jks10lf_pqvv1sy7v740000gn/T/pip-install-63jdDZ/nltk/setup.py' ----------------------------------------Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/3b/yskb8jks10lf_pqvv1sy7v740000gn/T/pip-install-63jdDZ/nltk/但是,如果我在没有任何版本规范的情况下运行,则不会出现错误。像下面这样:pip2 install nltk;我该如何解决这个问题?
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