使用Python3.6安装NLTK时出错

我试图运行“pip install nltk”，但得到如此多的错误。尽管我试图安装导致错误的依赖关系，但它们并没有被安装。使用Python3.6安装NLTK时出错

Invalid requirement: 'nltk()' 
Traceback (most recent call last): 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\packagi 
ng\requirements.py", line 92, in __init__ 
    req = REQUIREMENT.parseString(requirement_string) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 1617, in parseString 
    raise exc 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 1607, in parseString 
    loc, tokens = self._parse(instring, 0) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 1379, in _parseNoCache 
    loc,tokens = self.parseImpl(instring, preloc, doActions) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 3376, in parseImpl 
    loc, exprtokens = e._parse(instring, loc, doActions) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 1383, in _parseNoCache 
    loc,tokens = self.parseImpl(instring, preloc, doActions) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\pyparsi 
ng.py", line 3164, in parseImpl 
    raise ParseException(instring, loc, self.errmsg, self) 
pip._vendor.pyparsing.ParseException: Expected stringEnd (at char 4), (line:1, c 
ol:5) 

During handling of the above exception, another exception occurred: 

Traceback (most recent call last): 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\req\req_install 
.py", line 82, in __init__ 
    req = Requirement(req) 
    File "c:\program files (x86)\python36-32\lib\site-packages\pip\_vendor\packagi 
ng\requirements.py", line 96, in __init__ 
    requirement_string[e.loc:e.loc + 8])) 
pip._vendor.packaging.requirements.InvalidRequirement: Invalid requirement, pars 
e error at "'()'"

请错误检查截图：Error Screenshot

来源

2017-05-06 Marium Jawed

Py3.6尚未正式支持，请参阅https://github.com/nltk/nltk/issues/1659 – alvas

可能的重复http://stackoverflow.com/questions/42313776/nltk-for-python- 3-6功能于windows64 – alvas

看来你没有安装软件包的权限。尝试以管理员身份运行命令行。

来源

2017-05-06 20:44:04 matusko

Python包同治最好的做法是创建一个虚拟的环境，看到http://python-guide-pt-br.readthedocs.io/en/latest/dev/virtualenvs/

首先安装virtualenv库本地用户

pip install --user virtualenv

见How to install python modules without root access?和PEP370

对于Python2 .7，创建目录下的虚拟环境my_nltk_project

virtualenv -p /usr/bin/python2.7 my_nltk_project

或者在Python3：

virtualenv -p /usr/bin/python3.5 my_nltk_project 
source my_nltk_project/bin/activate

确保Python3是Py3.4或Py3.5，Py3.6尚未正式支持，看到https://github.com/nltk/nltk/issues/1659

现在你应该在虚拟环境中，您的命令提示符将如下所示：

(my_nltk_project):~$

现在做一个点子安装：

pip install nltk

可选择使用-U选择是升级nltk（pip install -U nltk）

你使用的环境中完成后，只要做到这一点离开环境：

(my_nltk_project):~$ deactivate

要重新使用环境：

:~$ source my_nltk_project/bin/activate

或者，你可以试试这个没有虚拟环境：

pip install --user nltk

如果你是一个Windows机器上，我们强烈建议您使用conda管理NLTK包，见https://gist.github.com/alvations/0ed8641d7d2e1941b9f9

来源

2017-05-08 09:02:37 alvas

使用Python3.6安装NLTK时出错

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