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+1a. Install numpy into python, for extra points use virtualenv, by running 'python setup.py install' in the numpy trunk
+1d. Download a nightly build of pypy and put the binary into the source tree, preferably at pypy/translator/goal/pypy. Alternatively, translate pypy
+2b. Something will fail. Poke around to see what the missing function or import is supposed to do. Hint: try http://docs.scipy.org/doc/numpy/reference/index.html
+2c. Write a test for the missing functionality. For instance, tests for multiarray live in lib_pypy/numpypy/test/test_multiarray.py Try to think of corner cases: inappropriate arguments, missing defaults, and other wierd combination of arguments.
+3c. Test under pypy, python, and then think again about the tests, did you miss a corner case? Testing is done by: