使用pip重新安装需求文件

Question

我尝试使用pip重新安装我的项目的要求,但我收到此错误.之前的安装失败.我怎么能删除它并继续？

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...

Answer 1

您可以继续删除该目录,这就是消息告诉您的内容.

Answer 2

用：

pip uninstall Django==1.5.4

或者

pip uninstall -r requirements.txt

如果这仍然不起作用，请进入Python/Lib/site-packages这些包所在的目录，然后删除它们。然后重新运行

pip install -r requirements.txt

这应该有效。