sudo port -k install py27-numpy
--->  Computing dependencies for py27-numpy
--->  Fetching archive for py27-numpy
--->  Attempting to fetch py27-numpy-1.6.1_1.darwin_11.i386.tbz2 from http://packages.macports.org/py27-numpy
--->  Fetching py27-numpy
--->  Verifying checksum(s) for py27-numpy
--->  Extracting py27-numpy
--->  Applying patches to py27-numpy
--->  Configuring py27-numpy
--->  Building py27-numpy
--->  Staging py27-numpy into destroot
--->  Installing py27-numpy @1.6.1_1
--->  Activating py27-numpy @1.6.1_1