Mailman 3 August 2012 - SciPy-Dev

scipy.linalg.lapack + C(ython)
by Robert Cimrman Aug. 7, 2012

Aug. 7, 2012

Hi, I need to write a C or Cython extension module that would involve repeated solves of a linear system with a dense matrix. For this, I would like to use the LAPACK function pointers provided by SciPy, to avoid dealing with LAPACK installation myself. I am aware of [1] so I know how to get to the right LAPACK function pointer, but it would help me a lot to look at an existing Cython or C code - has anyone done something similar? Best regards, r. [1] http://mail.scipy.org/pipermail/numpy-discussion/2012-March/061236.html

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Contributing to SciPy?
by Thomas Haslwanter Aug. 4, 2012

Aug. 4, 2012

Hi, I found an error on the SciPy Cookbook (described below), and wanted to fix it. So I wrote a corrected version and a unittest procedure. But now I don't know how I can submit/contribute it to SciPy. (BTW, the wiki did not let me to change it, even after I registered.) Is the only way to pull the whole sourcecode, install Fortran and C++ compilers, etc? Or can I just submit Python code? Please let me know. The problem: The Cookbook entry http://www.scipy.org/Cookbook/SavitzkyGolay has a number of problems: 1) As it is, it does in general not run. The line "import numpy as np" should be inserted before the first "try" in line 49 2) I don't completely understand the workings of the code. However, when you put in a sine-wave and calculate the first derivative, you get out a negative(!) cosine - not a cosine. The correct result appears if you replace "m," in line 68 with "m[::-1]," Since the Savitzky-Golay filter is a very commonly used filter, I regard this mistake as significant. thomas

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Unable to compile scipy for python 2.7 ( VC8 and Intel Fortran compiler) on win64.
by Santosh Pratap Singh Aug. 3, 2012

Aug. 3, 2012

Greetings EveryOne, I am compiling SciPy (With BLAS and LAPACK Support) with the following 1: Python2.7 2: VC8 3: Intel Fortran I start compiling with this commands : 1: set BLAS=F:\scipy\scipy-0.10.1\blas.lib 2: set LAPACK=F:\scipy\scipy-0.10.1\lapack.lib (The blas.lib and lapack.lib I have copied from intel installation C:\Program Files (x86)\Intel\Composer XE 2011 SP1\mkl\lib\intel64\mkl_blas95_lp64.lib and C:\Program Files (x86)\Intel\Composer XE 2011 SP1\mkl\lib\intel64\mkl_blas95_lp64.lib respectively) 3: python setup.py install Seems like the compilation goes fine but I am getting issue while linking *link command:* C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\BIN\amd64\link.exe /DLL /nologo /INCREMENTAL:NO /LIBPATH:F:\scipy\scipy-0.10.1 /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\libs /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\PCbuild\amd64 /LIBPATH:build\temp.win-amd64-2.7 /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\libs /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\PCbuild\amd64 /LIBPATH:build\temp.win-amd64-2.7 odepack.lib linpack_lite.lib mach.lib blas.lib python27.lib /EXPORT:init_odepack build\temp.win-amd64-2.7\Release\scipy\integrate\_odepackmodule.obj /OUT:build\lib.win-amd64-2.7\scipy\integrate\_odepack.pyd /IMPLIB:build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.lib /MANIFESTFILE:build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.pyd.manifest *Error:* Found executable C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\BIN\amd64\link.exe _odepackmodule.obj : warning LNK4197: export 'init_odepack' specified multiple times; using first specification Creating library build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.lib and object build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.exp odepack.lib(vode.o) : error LNK2019: unresolved external symbol dcopy_ referenced in function dvode_ odepack.lib(vode.o) : error LNK2019: unresolved external symbol dscal_ referenced in function dvode_ linpack_lite.lib(dgbfa.o) : error LNK2001: unresolved external symbol dscal_ linpack_lite.lib(dgefa.o) : error LNK2001: unresolved external symbol dscal_ linpack_lite.lib(dgesl.o) : error LNK2001: unresolved external symbol daxpy_ odepack.lib(vode.o) : error LNK2019: unresolved external symbol daxpy_ referenced in function dvstep_ linpack_lite.lib(dgbfa.o) : error LNK2001: unresolved external symbol daxpy_ linpack_lite.lib(dgefa.o) : error LNK2001: unresolved external symbol daxpy_ linpack_lite.lib(dgbsl.o) : error LNK2001: unresolved external symbol daxpy_ linpack_lite.lib(dgbfa.o) : error LNK2019: unresolved external symbol idamax_ referenced in function dgbfa_ linpack_lite.lib(dgefa.o) : error LNK2001: unresolved external symbol idamax_ linpack_lite.lib(dgbsl.o) : error LNK2019: unresolved external symbol ddot_ referenced in function dgbsl_ linpack_lite.lib(dgesl.o) : error LNK2001: unresolved external symbol ddot_ build\lib.win-amd64-2.7\scipy\integrate\_odepack.pyd : fatal error LNK1120: 5 unresolved externals error: Command "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\BIN\amd64\link.exe /DLL /nologo /INCREMENTAL:NO /LIBPATH:F:\scipy\scipy-0.10.1 /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\libs /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\PCbuild\amd64 /LIBPATH:build\temp.win-amd64-2.7 /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\libs /LIBPATH:F:\TeamcityBuilds\FluxBuilds\AFD15.0\CPython\2_7_3\winx64\Release\python\PCbuild\amd64 /LIBPATH:build\temp.win-amd64-2.7 odepack.lib linpack_lite.lib mach.lib blas.lib python27.lib /EXPORT:init_odepack build\temp.win-amd64-2.7\Release\scipy\integrate\_odepackmodule.obj /OUT:build\lib.win-amd64-2.7\scipy\integrate\_odepack.pyd /IMPLIB:build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.lib /MANIFESTFILE:build\temp.win-amd64-2.7\Release\scipy\integrate\_odepack.pyd.manifest" failed with exit status 1120 I have also attached the log file for more details. I will really appreciate if someone tell me the exact steps I should follow. Thanks. Santosh

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