Question

如果我只是这样做：

import lightgbm as lgb

我正在

python script.py 
Traceback (most recent call last):
File "script.py", line 4, in <module>
import lightgbm as lgb
File "/usr/local/lib/python2.7/site-packages/lightgbm/__init__.py", line 8, in <module>
from .basic import Booster, Dataset
File "/usr/local/lib/python2.7/site-packages/lightgbm/basic.py", line 31, in <module>
_LIB = _load_lib()
File "/usr/local/lib/python2.7/site-packages/lightgbm/basic.py", line 26, in _load_lib
lib = ctypes.cdll.LoadLibrary(lib_path[0])
File "/usr/local/Cellar/python/2.7.12/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 440, in LoadLibrary
return self._dlltype(name)
File "/usr/local/Cellar/python/2.7.12/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 362, in __init__
self._handle = _dlopen(self._name, mode)
OSError: dlopen(/usr/local/lib/python2.7/site-packages/lightgbm/lib_lightgbm.so, 6): Library not loaded: /usr/local/opt/gcc/lib/gcc/7/libgomp.1.dylib
Referenced from: /usr/local/lib/python2.7/site-packages/lightgbm/lib_lightgbm.so
Reason: image not found

我似乎已正确安装所有内容：

python -m pip install lightgbm
Requirement already satisfied: lightgbm in /usr/local/lib/python2.7/site-packages
Requirement already satisfied: wheel in /usr/local/lib/python2.7/site-packages (from lightgbm)
Requirement already satisfied: scikit-learn in /usr/local/lib/python2.7/site-packages (from lightgbm)
Requirement already satisfied: scipy in /usr/local/lib/python2.7/site-packages (from lightgbm)
Requirement already satisfied: numpy in /usr/local/lib/python2.7/site-packages (from lightgbm)

我的GCC文件夹中有一个6个文件夹。我是否需要安装另一个版本的GCC才能使用？

Answer 1

我在这里找到了类似的问题LightGBM
答案和评论可能对您有所帮助。

在Mac中构建LightGBM：

brew install cmake  
brew install gcc --without-multilib  
git clone --recursive https://github.com/Microsoft/LightGBM ; cd LightGBM  
mkdir build ; cd build  
cmake ..   
make -j

然后安装：

cd ../python-packages  
sudo python setup.py install --precompile

如@ecodan所述，您可能需要强制Mac使用GCC和G ++而不是默认编译器。因此，不要使用cmake ..进行构建，请尝试：

cmake -DCMAKE_C_COMPILER=/usr/local/Cellar/gcc/6.1.0/bin/gcc-6 -DCMAKE_CXX_COMPILER=/usr/local/Cellar/gcc/6.1.0/bin/g++-6 ..

调整版本以匹配您的版本。

Answer 2

以上所有答案均不适用于我。在Mac上，如果我使用brew安装了libomp，则可以解决此问题：请参阅：link

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}

Answer 3

在MAC上你需要安装open-mpi：

brew install open-mpi

Answer 4

相同的错误，不同的来源：好像我安装了 gcc 8 版本，它需要gcc 7.

通过将其切换回上一个gcc 7版本来实现：

brew switch gcc 7.3.0_1

Answer 5

对于使用macports的用户，请使用以下命令替换brew解决方案的开头：

port install gcc7 cmake
export CXX=g++-mp-7 CC=gcc-mp-7

Answer 6

在安装了MacPorts的MacOS High Sierra上，我执行了以下操作：

使用MacPorts安装clang-5.0
在/build目录中，运行 cmake -DCMAKE_CXX_COMPILER=clang++-mp-5.0 -DCMAKE_C_COMPILER=clang-mp-5.0 ..
要构建python包，请转到/python_package目录并修改setup.py脚本。您需要在检查其他操作系统（包括Mac）的情况的最后修改函数compile_cpp()。在silent_call(...)之前，添加以下两行： cmake_cmd.append("-DCMAKE_CXX_COMPILER=clang++-mp-5.0") cmake_cmd.append("-DCMAKE_C_COMPILER=clang-mp-5.0")
运行sudo python setup.py install。享受

Answer 7

我使用了从PyCharm生成的命令，它对我有用。

conda install -p {<=替换为USER_HOME_DIR>} / anaconda3 lightgbm -y

注意：我尝试安装Brew和pip，但它们对我不起作用，因为Azure ML Studio已经下载了其他版本的LightGBM，这些版本在升级到正确的软件包时引起冲突。

Lightgbm OSError，未加载库

7 个答案: