While developing a testcase for NumPy in Cython, I had the problem demonstrated below. Essentially this means that I couldn't run testcases in our Cython testing framework (though I will work around it). Is this some known restriction in how NumPy can be used, is it work in progress, a problem with my environment/Ubuntu, or should I file a bug report? This was on an up-to-date Ubunty Hardy 64-bit i386 system (with distro numpy, Python and distutils). Py> import numpy is ok, however (note the uppercase UnixCCompiler in dir(...)): Py> import distutils.unixccompiler Py> dir(distutils.unixccompiler) ['CCompiler', 'CompileError', 'DistutilsExecError', 'LibError', 'LinkError', 'NoneType', 'StringType', 'UnixCCompiler', '__builtins__', '__doc__', '__file__', '__name__', '__revision__', '_darwin_compiler_fixup', 'copy', 'gen_lib_options', 'gen_preprocess_options', 'log', 'newer', 'os', 'sys', 'sysconfig'] Py> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.5/site-packages/numpy/__init__.py", line 37, in <module> import testing File "/usr/lib/python2.5/site-packages/numpy/testing/__init__.py", line 3, in <module> from numpytest import * File "/usr/lib/python2.5/site-packages/numpy/testing/numpytest.py", line 19, in <module> from numpy.distutils.exec_command import splitcmdline File "/usr/lib/python2.5/site-packages/numpy/distutils/__init__.py", line 6, in <module> import ccompiler File "/usr/lib/python2.5/site-packages/numpy/distutils/ccompiler.py", line 393, in <module> setattr(getattr(_m, _cc+'compiler'), 'gen_lib_options', AttributeError: 'module' object has no attribute 'unixccompiler' -- Dag Sverre