I took a new clean install of OSX 10.9.3 and installed pip, and then did

```

pip install pandas
pip install numpy

```

Both installs seemed to be perfectly happy, and ran without any errors (though there were a zillion warnings). When I tried to run a python script with import pandas, I got the following error:

```

    numpy.dtype has the wrong size, try recompiling Traceback (most recent call last): 
    File "./moen.py", line 7, in  import pandas File "/Library/Python/2.7/site-packages/pandas/__init__.py", line 6, in  from . import hashtable, tslib, lib 
    File "numpy.pxd", line 157, in init pandas.hashtable (pandas/hashtable.c:22331) 
    ValueError: numpy.dtype has the wrong size, try recompiling

```

How do I fix this error and get pandas to load properly?