Python Ver-3.9 的 Numpy 安装

Question

我正在尝试安装 NumPy 但遇到问题。我使用的python版本是3.9，Windows版本是10，错误如下：C:\>pip3 install numpyCollecting numpyUsing cached numpy-1.19.2.zip (7.3 MB)Installing build dependencies ... doneGetting requirements to build wheel ... donePreparing wheel metadata ... errorERROR: Command errored out with exit status 1: command: 'c:\users\arr48\appdata\local\programs\python\python39\python.exe' 'c:\users\arr48\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\arr48\AppData\Local\Temp\tmp0g3__7ax'     cwd: C:\Users\arr48\AppData\Local\Temp\pip-install-fincp1mj\numpyComplete output (200 lines):Running from numpy source directory.setup.py:470: UserWarning: Unrecognized setuptools command, proceeding with generating Cython sources and expanding templates  run_build = parse_setuppy_commands()Processing numpy/random\_bounded_integers.pxd.inProcessing numpy/random\bit_generator.pyxProcessing numpy/random\mtrand.pyxProcessing numpy/random\_bounded_integers.pyx.inProcessing numpy/random\_common.pyxProcessing numpy/random\_generator.pyxProcessing numpy/random\_mt19937.pyxProcessing numpy/random\_pcg64.pyxProcessing numpy/random\_philox.pyxProcessing numpy/random\_sfc64.pyxCythonizing sourcesblas_opt_info:blas_mkl_info:No module named 'numpy.distutils._msvccompiler' in numpy.distutils; trying from distutilscustomize MSVCCompiler  libraries mkl_rt not found in ['c:\\users\\arr48\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\arr48\\appdata\\local\\programs\\python\\python39\\libs']  NOT AVAILABLEblis_info:  libraries blis not found in ['c:\\users\\arr48\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\arr48\\appdata\\local\\programs\\python\\python39\\libs']  NOT AVAILABLE

Answer 1

该numpy软件包尚不包含 Python 3.9 的二进制文件，因此pip尝试从源代码进行编译。正如错误消息所示，这（当然）要求您拥有适当的 C 编译器。这并不简单。pip想要 Visual C++ 14.2。Microsoft 提供的唯一版本是 Visual C++ 2019，又名版本 16，它不能与pip. 

pip使用如下方式安装轮子：

pip install D:\Users\<user>\Downloads\numpy-1.19.2+mkl-cp39-cp39-win_amd64.whl

Answer 2

最后几行说：

“错误：需要 Microsoft Visual C++ 14.0。通过“Build Tools for Visual Studio”获取它： https: //visualstudio.microsoft.com/downloads/”

你有 msvc 14 吗？