使用pip重新安装需求文件 [英] Reinstalling requirement file using pip

问题描述

我尝试使用pip重新安装项目要求，但出现此错误.以前有一个失败的安装.如何删除它并继续?

I try to reinstall requirements for my project using pip but I get this error. There is a previous failed installation. how can I delete it and proceed ?

E:\projects\project course\tkz>pip install -r requirements.txt
Downloading/unpacking Django==1.5.4 (from -r requirements.txt (line 1))
pip can't proceed with requirement 'Django==1.5.4 (from -r requirements.txt (lin
e 1))' due to a pre-existing build directory.
location: c:\users\sina\appdata\local\temp\pip_build_sina\Django
This is likely due to a previous installation that failed.
pip is being responsible and not assuming it can delete this.
Please delete it and try again.

Cleaning up...

推荐答案

使用:

pip uninstall Django==1.5.4

或

pip uninstall -r requirements.txt

如果仍然不起作用，请进入这些软件包所在的Python/Lib/site-packages目录，并删除它们.然后重新运行

If that still doesn't work, then go into you Python/Lib/site-packages directory where these packages live, and delete them. Then re-run

 `pip install -r requirements.txt` 

那应该起作用.

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