Reinstalling requirement file using pip

问题:

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...

回答1:

Use:

pip uninstall Django==1.5.4

or

pip uninstall -r requirements.txt

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` 

and that should work.

回答2:

You can just go ahead and delete that directory, that's what the message is telling you.

回答3:

Can you try pip install -I django==1.5.4?

回答4:

You need to delete the whole directory:

cd c:\users\sina\appdata\local\temp\pip_build_sina
rm -R Django

Now you can reinstall Django again