Error Install Pandas for Python on Mac OS X

Question

I want to install pandas for use in Python

I have the latest release of xcode and command line tool, pip, easy_install, but installing this keeps giving me the following error, anyone can help?

sudo easy_install pandas

> Best match: pandas 0.13.1
>Downloading https://pypi.python.org/packages/source/p/pandas/pandas-0.13.1.zip#md5=50e4902238dd5312c20c1c85fb024bb6
>Processing pandas-0.13.1.zip
>Running pandas-0.13.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-oU7Yfm/pandas-0.13.1/egg-dist-tmp-I4Mw_P
>warning: no files found matching 'README.rst'  no previously-included directories found matching 'doc/build'
>warning: no previously-included files matching '*.so' found anywhere in distribution
>warning: no previously-included files matching '*.pyd' found anywhere in distribution
>warning: no previously-included files matching '*.pyc' found anywhere in distribution
>warning: no previously-included files matching '.git*' found anywhere in distribution
>warning: no previously-included files matching '.DS_Store' found anywhere in distribution
>warning: no previously-included files matching '*.png' found anywhere in distribution
>clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
>clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
>error: Setup script exited with error: command 'cc' failed with exit status 1

Answer 1

As noted in the comments, this is a now common problem caused by changes in Xcode 5.1 and by Apple's choice of build options for the system Python 2.7. You can work around the issue by removing the offending options as suggested here. If you need to use sudo (which you might if you use the system-provided easy_install), you'll also need to ensure you define the variables in the sudo environment. One way to do it is:

sudo bash
umask 022
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
/usr/bin/easy_install pandas
exit

There are other options that would not require sudo like using a virtualenv or using pip install --user pandas.

UPDATE [2014-05-16]: As expected, Apple has fixed this problem with updated system Pythons (2.7, 2.6, and 2.5) in OS X 10.9.3 so the workaround is no longer necessary when using the latest Mavericks and Xcode 5.1+. However, as of now, the workaround is still required for OS X 10.8.x (Mountain Lion, currently 10.8.5) if you are using Xcode 5.1+ there.