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Hi, for a current svn checkout of numpy and installing with python setup.py build python setup.py install --prefix=/tmp/NUMPY this results in an install under: $HOME/.PythonLibrary/Python2.3/ ... (("""copying build/lib.linux-i686-2.3/numpy/_import_tools.py -> /home/abaecker/.PythonLibrary/Python2.3/site-packages/numpy""")) Only f2py behaves and gets installed in /tmp/NUMPY/bin. First I thought that it has something to do with a setuptools test I did some time ago, but moving ~/.PythonLibrary to a different place before installing numpy did not help. (it was also not on the PYTHONPATH before, so it should not have made a difference anyway). Even more weirdly, everything works fine on a different machine. So it looks like some configuration issue. On the other hand I did a couple of builds before (some time ago) on this machine. Before I start looking into this in more detail, I would be interested in any ideas how the above could come about and what tests I could do. In addition to the above I get a couple of warnings/errors (see below). I am not sure about their relevance (I don't remember to have seen them before). Best, Arnd Warning: not existing path in numpy/distutils: site.cfg No module named __svn_version__ F2PY Version 2_2255 blas_opt_info: blas_mkl_info: /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['mkl', 'vml', 'guide'] found_libs=[] warnings.warn("Library error: libs=%s found_libs=%s" % \ NOT AVAILABLE atlas_blas_threads_info: Setting PTATLAS=ATLAS /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['ptf77blas', 'ptcblas', 'atlas'] found_libs=[] warnings.warn("Library error: libs=%s found_libs=%s" % \ /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['ptf77blas', 'ptcblas', 'atlas'] found_libs=['/usr/lib/sse2/libatlas.so'] warnings.warn("Library error: libs=%s found_libs=%s" % \ /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['ptf77blas', 'ptcblas', 'atlas'] found_libs=['/usr/lib/sse2/libatlas.a'] warnings.warn("Library error: libs=%s found_libs=%s" % \ /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['ptf77blas', 'ptcblas', 'atlas'] found_libs=['/usr/lib/libatlas.so'] warnings.warn("Library error: libs=%s found_libs=%s" % \ NOT AVAILABLE atlas_blas_info: /tmp/NUMPY/numpy/numpy/distutils/system_info.py:531: UserWarning: Library error: libs=['f77blas', 'cblas', 'atlas'] found_libs=[] warnings.warn("Library error: libs=%s found_libs=%s" % \ FOUND: libraries = ['f77blas', 'cblas', 'atlas'] library_dirs = ['/usr/lib/sse2'] language = c include_dirs = ['/usr/include'] /tmp/NUMPY/numpy/numpy/distutils/system_info.py:1075: FutureWarning: hex()/oct() of negative int will return a signed string in Python 2.4 and up magic = hex(hash(repr(config)))