pip install error - cython required to install from tarball?

[jdu]

0.16 install from pip on ubuntu 12.04 LTS 64 bit edition currently throws an error:

Exception: Cython-generated file 'pandas/msgpack.c' not found.
Cython is required to compile pandas from a development branch.
Please install Cython or download a release package of pandas.

I did not specify a dev branch install from pip, simply ran

sudo pip install pandas and it produced the above error, python-dev and build-essential are installed, available and the latest updates on ubuntu 12.04 64

Thanks for reporting this, it has already been fixed (#5844) and will be part of the
next 0.13.1 release. I've uploaded a corrected tarball to github releases, so you can immediately:

pip install https://github.com/pydata/pandas/releases/download/v0.13.0/pandas-0.13.0.tar.gz

I'll send the word out to get the fixed version uploaded to pypi as well, that might
take a few days though.

In the future, it would be a great help if you pitch in and test the RC release when we
announce it and help us catch these problems earlier. Thanks.