Why does pip fail with bad md5 hash for package?

问题

I'm trying to install Django package in a virtualenv. I'm on a new computer (OSX 10.8.2). I installed virtualenv via easy_install. With the virtualenv activated, I ran:

(pyenv)$ pip install Django
Downloading/unpacking Django
  Downloading Django-1.5.1.tar.gz (8.0MB): 2.0MB downloaded
  Hash of the package https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz#md5=7465f6383264ba167a9a031d6b058bff (from https://pypi.python.org/simple/Django/) (<md5 HASH object @ 0x108453df0>) doesn't match the expected hash 7465f6383264ba167a9a031d6b058bff!
Bad md5 hash for package https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz#md5=7465f6383264ba167a9a031d6b058bff (from https://pypi.python.org/simple/Django/)

This happens even if I delete virtualenv and start over. I've tried again repeatedly over the past few hours, it always happens. Any suggestions?

回答1:

If it's just this package that you can't get to install, you could download the tarball manually, and then use pip to install it from that file. The Django download site has checksums that you can validate manually as well. I don't use osx, but probably something like this would help:

cd /tmp
wget https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz
md5sum Django-1.5.1.tar.gz
pip install Django-1.5.1.tar.gz

回答2:

I have the same problem when I try sudo pip install Pillow, and I try sudo pip install --no-cache-dir Pillow, it works for me.

回答3:

For me below command works

pip install django --no-cache-dir

回答4:

I now had this issue several times.

Like others mentioned before me, pip install [module] --no-cache-dir helps most of the time.

But sometimes, you got some dependencies to install first and it fails installing one of these (md5 validation failed).

Just had this problem myself. In this case, installing this dependency alone like pip install dependency worked and after that I was able to install the first module.

Also pip install -vvv is nice for more info gathering on general problem solving

来源：https://stackoverflow.com/questions/16025788/why-does-pip-fail-with-bad-md5-hash-for-package