【老码农随心记】Mac安装LGB，报错：'/usr/lib/libomp.dylib' (no such file)的解决办法

现象

背景

pip install lightgbm -i https://pypi.tuna.tsinghua.edu.cn/simple

• 我的电脑是mac，芯片是苹果M1（苹果M1的芯片安装软件时有时会有兼容性问题发生）

jupyter lab的notebook中执行

import lightgbm as lgb
lgb_classifier = lgb.LGBMClassifier()

出现下面错误

Referenced from: /opt/homebrew/anaconda3/envs/biligame/lib/python3.7/site-packages/lightgbm/lib_lightgbm.so
  Reason: tried: '/usr/local/opt/libomp/lib/libomp.dylib' (no such file), '/usr/local/lib/libomp.dylib' (no such file), '/usr/lib/libomp.dylib' (no such file)

解决方案

在网络上搜索了下，大概有2种方案

方案一：安装libomp，亲测，不起效果，请继续看方案二

brew install open-mpi

Or

brew reinstall libomp

方案二：写在后用conda命令重装

下载之前安装的lightgbm

pip uninstall lightgbm

重新用conda命令安装

conda install lightgbm

• 执行结果 (coder) cynthia@192 ~ % conda install lightgbm Collecting package metadata (current_repodata.json): done Solving environment: - Warning: 8 possible package resolutions (only showing differing packages): - conda-forge/osx-64::ca-certificates-2022.5.18.1-h033912b_0, conda-forge/osx-64::certifi-2022.5.18.1-py38h50d1736_0, conda-forge/osx-64::openssl-3.0.3-hfe4f2af_0 ...

打开Jupyter lab重新执行，可以导入正常