dedupeio/pylbfgs

:mountain_cableway: Python/Cython wrapper for liblbfgs

pylbfgs's Issues

Fused types for 32 and 64bit systems

@wolfgang-noichl, I think you want to used fused types to support both 32 and 64 bit systems. If you get that working, I'll merge it into master.

Add support to release aarch64 wheels

Problem

On aarch64, ‘pip install pylbfgs’ builds the wheels from source code and then installs it. It requires the user to have a development environment installed on his system. Also, it takes some time to build the wheels than downloading and extracting the wheels from pypi.

Resolution

On aarch64, ‘pip install pylbfgs’ should download the wheels from pypi

@fgregg Please let me know your interest in releasing aarch64 wheels. I can help in this.

Not compatible with python 3.11

Building on windows

@Shotgunosine, can you try to build this wheel again from pip. Made some changes that should fix your problem.

Relates to dedupeio/dedupe#407 (comment)

cython/numpy dependency borks pipenv installation with Python 3.7

pylbfgs_traceback.txt
There seems to be a cython issue when Python 3.7 tries to install numpy version 13.1.1 or 14.0 (version 15.0 works just fine).

This step breaks a pylbfgs install, and thus also one for dedupe and csvdedupe:

Collecting numpy==1.13.1
    Using cached https://files.pythonhosted.org/packages/c0/3a/40967d9f5675fbb097ffec170f59c2ba19fc96373e73ad47c2cae9a30aed/numpy-1.13.1.zip
  Building wheels for collected packages: numpy
    Running setup.py bdist_wheel for numpy: started
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: finished with status 'error'

Even when I blow away all cached dependencies in my project to ensure that it's not trying to use a locally cached cython or numpy 13.1.1, I get a broken install and the kind of cython-y compile backtrace nightmares are made of. (The full backtrace is longer than 65536 characters and not supported, but I've added some of what I hope are the most directly relevant parts at the bottom. The full traceback I've attached as a txt file.)

This issue also seems to have befallen pandas although now that install works fine, using numpy 15.0 as a dependency.

About my environment:

• Mac OS X 10.12.6
• Python 3.7
• pipenv 2018.7.1
• shell: zsh

Backtrace bits:

-> % pipenv install pylbfgs
Installing pylbfgs...
Collecting pylbfgs
  Using cached https://files.pythonhosted.org/packages/c9/b5/afbdb7342c973e808dbf570d2db8a5d0962ea9bd3bff73de2fb0f5344bd4/PyLBFGS-0.2.0.11.tar.gz
  Installing build dependencies: started
  Installing build dependencies: still running...
  Installing build dependencies: still running...
  Installing build dependencies: finished with status 'error'
  Complete output from command /user_root/venvs/bin/python3.7 -m pip install --ignore-installed --no-user --prefix /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-build-env-ous3i0xg --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel cython numpy==1.13.1:
  Collecting setuptools
    Using cached https://files.pythonhosted.org/packages/ff/f4/385715ccc461885f3cedf57a41ae3c12b5fec3f35cce4c8706b1a112a133/setuptools-40.0.0-py2.py3-none-any.whl
  Collecting wheel
    Using cached https://files.pythonhosted.org/packages/81/30/e935244ca6165187ae8be876b6316ae201b71485538ffac1d718843025a9/wheel-0.31.1-py2.py3-none-any.whl
  Collecting cython
    Using cached https://files.pythonhosted.org/packages/e3/bb/d43cf512f7ee32653d8e3ae8dbb71f111096a8a16c1176128915de1a3ff5/Cython-0.28.5-cp37-cp37m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
  Collecting numpy==1.13.1
    Using cached https://files.pythonhosted.org/packages/c0/3a/40967d9f5675fbb097ffec170f59c2ba19fc96373e73ad47c2cae9a30aed/numpy-1.13.1.zip
  Building wheels for collected packages: numpy
    Running setup.py bdist_wheel for numpy: started
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: still running...
    Running setup.py bdist_wheel for numpy: finished with status 'error'
    Complete output from command /user_root/venvs/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-install-2udqohes/numpy/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-wheel-s5gg73sf --python-tag cp37:
    Running from numpy source directory.
    blas_opt_info:
    blas_mkl_info:
      libraries mkl_rt not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    blis_info:
      libraries blis not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    openblas_info:
      libraries openblas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    atlas_3_10_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries tatlas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    atlas_3_10_blas_info:
      libraries satlas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    atlas_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries ptf77blas,ptcblas,atlas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    atlas_blas_info:
      libraries f77blas,cblas,atlas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
      FOUND:
        extra_compile_args = ['-msse3', '-I/System/Library/Frameworks/vecLib.framework/Headers']
        extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
        define_macros = [('NO_ATLAS_INFO', 3), ('HAVE_CBLAS', None)]
  
    non-existing path in 'numpy/distutils': 'site.cfg'
    F2PY Version 2
    lapack_opt_info:
    lapack_mkl_info:
      libraries mkl_rt not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    openblas_lapack_info:
      libraries openblas not found in ['/user_root/venvs/bin/../lib', '/usr/local/lib', '/usr/lib', '/opt/local/lib']
      NOT AVAILABLE
  
    atlas_3_10_threads_info:
    Setting PTATLAS=ATLAS
      libraries tatlas,tatlas not found in /user_root/venvs/bin/../lib
      libraries lapack_atlas not found in /user_root/venvs/bin/../lib
      libraries tatlas,tatlas not found in /usr/local/lib
      libraries lapack_atlas not found in /usr/local/lib
      libraries tatlas,tatlas not found in /usr/lib
      libraries lapack_atlas not found in /usr/lib
      libraries tatlas,tatlas not found in /opt/local/lib
      libraries lapack_atlas not found in /opt/local/lib
    <class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
      NOT AVAILABLE
  
    atlas_3_10_info:
      libraries satlas,satlas not found in /user_root/venvs/bin/../lib
      libraries lapack_atlas not found in /user_root/venvs/bin/../lib
      libraries satlas,satlas not found in /usr/local/lib
      libraries lapack_atlas not found in /usr/local/lib
      libraries satlas,satlas not found in /usr/lib
      libraries lapack_atlas not found in /usr/lib
      libraries satlas,satlas not found in /opt/local/lib
      libraries lapack_atlas not found in /opt/local/lib
    <class 'numpy.distutils.system_info.atlas_3_10_info'>
      NOT AVAILABLE
  
    atlas_threads_info:
    Setting PTATLAS=ATLAS
      libraries ptf77blas,ptcblas,atlas not found in /user_root/venvs/bin/../lib
      libraries lapack_atlas not found in /user_root/venvs/bin/../lib
      libraries ptf77blas,ptcblas,atlas not found in /usr/local/lib
      libraries lapack_atlas not found in /usr/local/lib
      libraries ptf77blas,ptcblas,atlas not found in /usr/lib
      libraries lapack_atlas not found in /usr/lib
      libraries ptf77blas,ptcblas,atlas not found in /opt/local/lib
      libraries lapack_atlas not found in /opt/local/lib
    <class 'numpy.distutils.system_info.atlas_threads_info'>
      NOT AVAILABLE
  
    atlas_info:
      libraries f77blas,cblas,atlas not found in /user_root/venvs/bin/../lib
      libraries lapack_atlas not found in /user_root/venvs/bin/../lib
      libraries f77blas,cblas,atlas not found in /usr/local/lib
      libraries lapack_atlas not found in /usr/local/lib
      libraries f77blas,cblas,atlas not found in /usr/lib
      libraries lapack_atlas not found in /usr/lib
      libraries f77blas,cblas,atlas not found in /opt/local/lib
      libraries lapack_atlas not found in /opt/local/lib
    <class 'numpy.distutils.system_info.atlas_info'>
      NOT AVAILABLE
  
      FOUND:
        extra_compile_args = ['-msse3']
        extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
        define_macros = [('NO_ATLAS_INFO', 3), ('HAVE_CBLAS', None)]
  
    /usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/distutils/dist.py:274: UserWarning: Unknown distribution option: 'define_macros'
      warnings.warn(msg)
    running bdist_wheel
    running build
    running config_cc
    unifing config_cc, config, build_clib, build_ext, build commands --compiler options
    running config_fc
    unifing config_fc, config, build_clib, build_ext, build commands --fcompiler options
    running build_src
    build_src
    building py_modules sources
    creating build
    creating build/src.macosx-10.12-x86_64-3.7
    creating build/src.macosx-10.12-x86_64-3.7/numpy
    creating build/src.macosx-10.12-x86_64-3.7/numpy/distutils
    building library "npymath" sources
    customize Gnu95FCompiler
    Found executable /usr/local/bin/gfortran
    customize Gnu95FCompiler
    customize Gnu95FCompiler using config
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall
  
    compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c'
    clang: _configtest.c
    clang _configtest.o -o _configtest
    success!
    removing: _configtest.c _configtest.o _configtest
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall
  
    compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c'
    clang: _configtest.c
    _configtest.c:1:5: warning: incompatible redeclaration of library function 'exp' [-Wincompatible-library-redeclaration]
    int exp (void);
        ^
    _configtest.c:1:5: note: 'exp' is a builtin with type 'double (double)'
    1 warning generated.
    clang _configtest.o -o _configtest
    success!
    removing: _configtest.c _configtest.o _configtest
    creating build/src.macosx-10.12-x86_64-3.7/numpy/core
    creating build/src.macosx-10.12-x86_64-3.7/numpy/core/src
    creating build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath/npy_math_internal.h
      adding 'build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath' to include_dirs.
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath/ieee754.c
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath/npy_math_complex.c
    None - nothing done with h_files = ['build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath/npy_math_internal.h']
    building library "npysort" sources
    creating build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort/quicksort.c
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort/mergesort.c
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort/heapsort.c
    creating build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private/npy_partition.h
      adding 'build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private' to include_dirs.
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort/selection.c
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private/npy_binsearch.h
    conv_template:> build/src.macosx-10.12-x86_64-3.7/numpy/core/src/npysort/binsearch.c
    None - nothing done with h_files = ['build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private/npy_partition.h', 'build/src.macosx-10.12-x86_64-3.7/numpy/core/src/private/npy_binsearch.h']
    building extension "numpy.core._dummy" sources
    Generating build/src.macosx-10.12-x86_64-3.7/numpy/core/include/numpy/config.h
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall
  
    compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c'
    clang: _configtest.c
    success!
    removing: _configtest.c _configtest.o
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall
  
    compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c'
    clang: _configtest.c
    _configtest.c:1:10: fatal error: 'endian.h' file not found
    #include <endian.h>
             ^~~~~~~~~~
    1 error generated.
    _configtest.c:1:10: fatal error: 'endian.h' file not found
    #include <endian.h>
             ^~~~~~~~~~
    1 error generated.
    failure.
    removing: _configtest.c _configtest.o
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall
  
    compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c'
    clang: _configtest.c
    _configtest.c:1:10: fatal error: 'sys/endian.h' file not found
    #include <sys/endian.h>
             ^~~~~~~~~~~~~~
    1 error generated.
    _configtest.c:1:10: fatal error: 'sys/endian.h' file not found
    #include <sys/endian.h>
             ^~~~~~~~~~~~~~
    1 error generated.
    failure.
    removing: _configtest.c _configtest.o
    C compiler: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall

snip

      16 errors generated.
      error: Command "clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -Inumpy/core/include -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/include/numpy -Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/private -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/private -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/private -Ibuild/src.macosx-10.12-x86_64-3.7/numpy/core/src/npymath -c numpy/random/mtrand/mtrand.c -o build/temp.macosx-10.12-x86_64-3.7/numpy/random/mtrand/mtrand.o -MMD -MF build/temp.macosx-10.12-x86_64-3.7/numpy/random/mtrand/mtrand.o.d" failed with exit status 1

snip

      ----------------------------------------
  Command "/user_root/venvs/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-install-2udqohes/numpy/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-record-xw0vmowy/install-record.txt --single-version-externally-managed --prefix /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-build-env-ous3i0xg --compile --install-headers /user_root/venvs/bin/../include/site/python3.7/numpy" failed with error code 1 in /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-install-2udqohes/numpy/
  
  ----------------------------------------

Error:  An error occurred while installing pylbfgs!
Command "/user_root/venvs/bin/python3.7 -m pip install --ignore-installed --no-user --prefix /private/var/folders/l8/6jl310wd3z5c7jqxfhkw9t4c0000gn/T/pip-build-env-ous3i0xg --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel cython numpy==1.13.1" failed with error code 1 in None

In-place build four hacking not documented correctly

It seems to me that

python setup.py build_ext -i

is not enough to build in-place for development. One seems to need do run

cython lbfgs/_lowlevel.pyx

before that.

Unable to install getting error

Environment:
image: python:3.9.13-alpine3.15

Collecting pylbfgs==0.2.0.13 (from -r /tmp/tmpnqe55yh1 (line 173))
111.3 Downloading PyLBFGS-0.2.0.13.tar.gz (105 kB)
111.3 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 105.2/105.2 kB 4.8 MB/s eta 0:00:00
111.4 Installing build dependencies: started
120.7 Installing build dependencies: finished with status 'done'
120.7 Getting requirements to build wheel: started
121.4 Getting requirements to build wheel: finished with status 'error'
121.5 error: subprocess-exited-with-error
121.5
121.5 × Getting requirements to build wheel did not run successfully.
121.5 │ exit code: 1
121.5 ╰─> [53 lines of output]
121.5 Compiling lbfgs/_lowlevel.pyx because it changed.
121.5 [1/1] Cythonizing lbfgs/_lowlevel.pyx
121.5 /tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/Cython/Compiler/Main.py:381: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /tmp/pip-install-c3shc_f2/pylbfgs_5d43d814162f405a9fc40586d659ea84/lbfgs/_lowlevel.pyx
121.5 tree = Parsing.p_module(s, pxd, full_module_name)
121.5
121.5 Error compiling Cython file:
121.5 ------------------------------------------------------------
121.5 ...
121.5
121.5 x_a = aligned_copy(x0.ravel())
121.5
121.5 try:
121.5 callback_data = (f, progress, x0.shape, args)
121.5 r = lbfgs(n, x_a, fx_final, call_eval,
121.5 ^
121.5 ------------------------------------------------------------
121.5
121.5 lbfgs/_lowlevel.pyx:395:40: Cannot assign type 'lbfgsfloatval_t (void *, lbfgsconst_p, lbfgsfloatval_t *, int, lbfgsfloatval_t) except? -1' to 'lbfgs_evaluate_t'
121.5
121.5 Error compiling Cython file:
121.5 ------------------------------------------------------------
121.5 ...
121.5 x_a = aligned_copy(x0.ravel())
121.5
121.5 try:
121.5 callback_data = (f, progress, x0.shape, args)
121.5 r = lbfgs(n, x_a, fx_final, call_eval,
121.5 call_progress, <void *>callback_data, &self.params)
121.5 ^
121.5 ------------------------------------------------------------
121.5
121.5 lbfgs/_lowlevel.pyx:396:22: Cannot assign type 'int (void *, lbfgsconst_p, lbfgsconst_p, lbfgsfloatval_t, lbfgsfloatval_t, lbfgsfloatval_t, lbfgsfloatval_t, int, int, int) except? -1' to 'lbfgs_progress_t'
121.5 Traceback (most recent call last):
121.5 File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in
121.5 main()
121.5 File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
121.5 json_out['return_val'] = hook(**hook_input['kwargs'])
121.5 File "/usr/local/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
121.5 return hook(config_settings)
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 341, in get_requires_for_build_wheel
121.5 return self._get_build_requires(config_settings, requirements=['wheel'])
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 323, in _get_build_requires
121.5 self.run_setup()
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 487, in run_setup
121.5 super(_BuildMetaLegacyBackend,
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 338, in run_setup
121.5 exec(code, locals())
121.5 File "", line 27, in
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/Cython/Build/Dependencies.py", line 1134, in cythonize
121.5 cythonize_one(*args)
121.5 File "/tmp/pip-build-env-4zuuu0hm/overlay/lib/python3.9/site-packages/Cython/Build/Dependencies.py", line 1301, in cythonize_one
121.5 raise CompileError(None, pyx_file)
121.5 Cython.Compiler.Errors.CompileError: lbfgs/_lowlevel.pyx
121.5 [end of output]
121.5
121.5 note: This error originates from a subprocess, and is likely not a problem with pip.
121.5 error: subprocess-exited-with-error
121.5
121.5 × Getting requirements to build wheel did not run successfully.
121.5 │ exit code: 1
121.5 ╰─> See above for output.
121.5
121.5 note: This error originates from a subprocess, and is likely not a problem with pip.
122.2 Traceback (most recent call last):
122.2 File "/usr/local/bin/pip-sync", line 8, in
122.2 sys.exit(cli())
122.2 File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1157, in call
122.2 return self.main(*args, **kwargs)
122.2 File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1078, in main
122.2 rv = self.invoke(ctx)
122.2 File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1434, in invoke
122.2 return ctx.invoke(self.callback, **ctx.params)
122.2 File "/usr/local/lib/python3.9/site-packages/click/core.py", line 783, in invoke
122.2 return __callback(*args, **kwargs)
122.2 File "/usr/local/lib/python3.9/site-packages/piptools/scripts/sync.py", line 203, in cli
122.2 sync.sync(
122.2 File "/usr/local/lib/python3.9/site-packages/piptools/sync.py", line 263, in sync
122.2 run( # nosec
122.2 File "/usr/local/lib/python3.9/subprocess.py", line 528, in run
122.2 raise CalledProcessError(retcode, process.args,
122.2 subprocess.CalledProcessError: Command '['/usr/local/bin/python', '-m', 'pip', 'install', '-r', '/tmp/tmpnqe55yh1']' returned non-zero exit status 1.

Allow return of last values if LBFGSERR_MAXIMUMITERATION

Hi,
thank you for maintaining this wrapper.

If have a small suggestion: Could we return the last value on LBFGSERR_MAXIMUMITERATION and emmit a warning instead of an exception (like it#s already done for LBFGSERR_ROUNDING_ERROR, LBFGSERR_MAXIMUMLINESEARCH ?
We could even have an optional flag for that behavior if you are adverse to returning non optimal values.
But likely the values returned will not be perfect, but for some applications 'good enough'. I believe this is the way scipy for example handles the case. And it makes setting the maximum number of iterations much more useful.

So instead of

pylbfgs/lbfgs/_lowlevel.pyx

Line 404 in 8583052

elif r in (LBFGSERR_ROUNDING_ERROR, LBFGSERR_MAXIMUMLINESEARCH) :

maybe

            elif r in (LBFGSERR_ROUNDING_ERROR, LBFGSERR_MAXIMUMLINESEARCH, LBFGSERR_MAXIMUMITERATION):

Have a great day,
Felix

ImportError: cannot import name 'owlqn'

Hello,

I successfully installed PyLBFGS module and i can import it without errors, but the problem is when i want to import 'owlqn' with: "from pylbfgs import owlqn", it doesn't work.
I tested it on both windows and ubuntu and the same issue occures on both.
Can you please help.
Thanks in advance.