linux下，pip安装lap出现问题，conda安装不在源内，已解决，有效

用pip安装出现报错，并且这个包网上查了很多都没办法解决，于是来记录一下我的解决方法。

1.  
   note: This error originates from a subprocess, and is likely not a problem with pip.
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   ERROR: Failed building wheel for lap
3.  
   Running setup.py clean for lap
4.  
   Failed to build lap
5.  
   Installing collected packages: lap
6.  
   Running setup.py install for lap ... error
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   error: subprocess-exited-with-error
8.  
    
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   × Running setup.py install for lap did not run successfully.
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    │ exit code: 1
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    ╰─> [34 lines of output]
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    Partial import of lap during the build process.
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    Generating cython files
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    running install
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    running build
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    running config_cc
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    unifing config_cc, config, build_clib, build_ext, build commands --compiler options
18.  
    running config_fc
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    unifing config_fc, config, build_clib, build_ext, build commands --fcompiler options
20.  
    running build_src
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    build_src
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    building extension "lap._lapjv" sources
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    building data_files sources
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    build_src: building npy-pkg config files
25.  
    running build_py
26.  
    creating build
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    creating build/lib.linux-x86_64-3.7
28.  
    creating build/lib.linux-x86_64-3.7/lap
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    copying lap/__init__.py -> build/lib.linux-x86_64-3.7/lap
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    copying lap/lapmod.py -> build/lib.linux-x86_64-3.7/lap
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    running build_ext
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    customize UnixCCompiler
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    customize UnixCCompiler using build_ext
34.  
    customize UnixCCompiler
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    customize UnixCCompiler using build_ext
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    building 'lap._lapjv' extension
37.  
    compiling C sources
38.  
    C compiler: g -pthread -B /root/anaconda3/envs/paddle/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC
39.  
     
40.  
    creating build/temp.linux-x86_64-3.7/lap
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    compile options: '-I/root/anaconda3/envs/paddle/lib/python3.7/site-packages/numpy/core/include -Ilap -I/root/anaconda3/envs/paddle/lib/python3.7/site-packages/numpy/core/include -I/root/anaconda3/envs/paddle/include/python3.7m -c'
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    g : lap/_lapjv.cppg : lap/lapjv.cppg : lap/lapmod.cpp
43.  
     
44.  
     
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    error: Command "g -pthread -B /root/anaconda3/envs/paddle/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/root/anaconda3/envs/paddle/lib/python3.7/site-packages/numpy/core/include -Ilap -I/root/anaconda3/envs/paddle/lib/python3.7/site-packages/numpy/core/include -I/root/anaconda3/envs/paddle/include/python3.7m -c lap/lapjv.cpp -o build/temp.linux-x86_64-3.7/lap/lapjv.o -MMD -MF build/temp.linux-x86_64-3.7/lap/lapjv.o.d" failed with exit status 127
46.  
    [end of output]
47.  
     
48.  
    note: This error originates from a subprocess, and is likely not a problem with pip.
49.  
    error: legacy-install-failure
50.  
     
51.  
    × Encountered error while trying to install package.
52.  
    ╰─> lap
53.  
     
54.  
    note: This is an issue with the package mentioned above, not pip.
55.  
    hint: See above for output from the failure.

conda安装出现不在源内，报错

1.  
   C:\Users\Dell>conda install lap
2.  
   Collecting package metadata (current_repodata.json): done
3.  
   Solving environment: failed with initial frozen solve. Retrying with flexible solve.
4.  
   Collecting package metadata (repodata.json): done
5.  
   Solving environment: failed with initial frozen solve. Retrying with flexible solve.
6.  
    
7.  
   PackagesNotFoundError: The following packages are not available from current channels:
8.  
    
9.  
   - lap
10.  
     
11.  
    Current channels:
12.  
     
13.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64
14.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
15.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/win-64
16.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/noarch
17.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/win-64
18.  
    - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/noarch
19.  
     
20.  
    To search for alternate channels that may provide the conda package you're
21.  
    looking for, navigate to
22.  
     
23.  
    https://anaconda.org
24.  
     
25.  
    and use the search bar at the top of the page.

解决方法一：

用conda安装，用以下命令：

conda install -c conda-forge lap

解决方法二：

用pip安装，用以下命令：

pip install git git://github.com/gatagat/lap.git

这个我没试过，因为第一种就成功了。

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