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I'm not able to install any package. I even tried updating pip and setuptools. I tried uninstalling and reinstalling python multiple times, but still the same error. I earlier had python 3.8 (32-bit), and it was working fine then. However, I needed 64-bit for tensorflow so I uninstalled the one I had got the latest (3.9) 64-bit version. My Windows is 64-bit so no problem there. The error I'm getting,

    C:\Users\AMIT(Home)>pip install numpy
Collecting numpy
  Using cached numpy-1.19.2.zip (7.3 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... error
    ERROR: Command errored out with exit status 1:
     command: 'c:\users\amit(home)\appdata\local\programs\python\python39\python.exe' 'c:\users\amit(home)\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\AMIT(Home)\AppData\Local\Temp\tmpq2gtxfef'
         cwd: C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy
    Complete 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.in
    Processing numpy/random\bit_generator.pyx
    Processing numpy/random\mtrand.pyx
    Processing numpy/random\_bounded_integers.pyx.in
    Processing numpy/random\_common.pyx
    Processing numpy/random\_generator.pyx
    Processing numpy/random\_mt19937.pyx
    Processing numpy/random\_pcg64.pyx
    Processing numpy/random\_philox.pyx
    Processing numpy/random\_sfc64.pyx
    Cythonizing sources
    blas_opt_info:
    blas_mkl_info:
    No module named 'numpy.distutils._msvccompiler' in numpy.distutils; trying from distutils
    customize MSVCCompiler
      libraries mkl_rt not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    blis_info:
      libraries blis not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    openblas_info:
      libraries openblas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
    get_default_fcompiler: matching types: '['gnu', 'intelv', 'absoft', 'compaqv', 'intelev', 'gnu95', 'g95', 'intelvem', 'intelem', 'flang']'
    customize GnuFCompiler
    Could not locate executable g77
    Could not locate executable f77
    customize IntelVisualFCompiler
    Could not locate executable ifort
    Could not locate executable ifl
    customize AbsoftFCompiler
    Could not locate executable f90
    customize CompaqVisualFCompiler
    Could not locate executable DF
    customize IntelItaniumVisualFCompiler
    Could not locate executable efl
    customize Gnu95FCompiler
    Could not locate executable gfortran
    Could not locate executable f95
    customize G95FCompiler
    Could not locate executable g95
    customize IntelEM64VisualFCompiler
    customize IntelEM64TFCompiler
    Could not locate executable efort
    Could not locate executable efc
    customize PGroupFlangCompiler
    Could not locate executable flang
    don't know how to compile Fortran code on platform 'nt'
      NOT AVAILABLE

    atlas_3_10_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries tatlas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    atlas_3_10_blas_info:
      libraries satlas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    atlas_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries ptf77blas,ptcblas,atlas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    atlas_blas_info:
      libraries f77blas,cblas,atlas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    accelerate_info:
      NOT AVAILABLE

    C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy\numpy\distutils\system_info.py:1914: UserWarning:
        Optimized (vendor) Blas libraries are not found.
        Falls back to netlib Blas library which has worse performance.
        A better performance should be easily gained by switching
        Blas library.
      if self._calc_info(blas):
    blas_info:
      libraries blas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy\numpy\distutils\system_info.py:1914: UserWarning:
        Blas (http://www.netlib.org/blas/) libraries not found.
        Directories to search for the libraries can be specified in the
        numpy/distutils/site.cfg file (section [blas]) or by setting
        the BLAS environment variable.
      if self._calc_info(blas):
    blas_src_info:
      NOT AVAILABLE

    C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy\numpy\distutils\system_info.py:1914: UserWarning:
        Blas (http://www.netlib.org/blas/) sources not found.
        Directories to search for the sources can be specified in the
        numpy/distutils/site.cfg file (section [blas_src]) or by setting
        the BLAS_SRC environment variable.
      if self._calc_info(blas):
      NOT AVAILABLE

    non-existing path in 'numpy\\distutils': 'site.cfg'
    lapack_opt_info:
    lapack_mkl_info:
      libraries mkl_rt not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    openblas_lapack_info:
      libraries openblas not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    openblas_clapack_info:
      libraries openblas,lapack not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    flame_info:
      libraries flame not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    atlas_3_10_threads_info:
    Setting PTATLAS=ATLAS
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries tatlas,tatlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries lapack_atlas not found in C:\
      libraries tatlas,tatlas not found in C:\
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
      libraries tatlas,tatlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
    <class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
      NOT AVAILABLE

    atlas_3_10_info:
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries satlas,satlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries lapack_atlas not found in C:\
      libraries satlas,satlas not found in C:\
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
      libraries satlas,satlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
    <class 'numpy.distutils.system_info.atlas_3_10_info'>
      NOT AVAILABLE

    atlas_threads_info:
    Setting PTATLAS=ATLAS
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries ptf77blas,ptcblas,atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries lapack_atlas not found in C:\
      libraries ptf77blas,ptcblas,atlas not found in C:\
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
      libraries ptf77blas,ptcblas,atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
    <class 'numpy.distutils.system_info.atlas_threads_info'>
      NOT AVAILABLE

    atlas_info:
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries f77blas,cblas,atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\lib
      libraries lapack_atlas not found in C:\
      libraries f77blas,cblas,atlas not found in C:\
      libraries lapack_atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
      libraries f77blas,cblas,atlas not found in c:\users\amit(home)\appdata\local\programs\python\python39\libs
    <class 'numpy.distutils.system_info.atlas_info'>
      NOT AVAILABLE

    lapack_info:
      libraries lapack not found in ['c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\lib', 'C:\\', 'c:\\users\\amit(home)\\appdata\\local\\programs\\python\\python39\\libs']
      NOT AVAILABLE

    C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy\numpy\distutils\system_info.py:1748: UserWarning:
        Lapack (http://www.netlib.org/lapack/) libraries not found.
        Directories to search for the libraries can be specified in the
        numpy/distutils/site.cfg file (section [lapack]) or by setting
        the LAPACK environment variable.
      return getattr(self, '_calc_info_{}'.format(name))()
    lapack_src_info:
      NOT AVAILABLE

    C:\Users\AMIT(Home)\AppData\Local\Temp\pip-install-g8tkhg_y\numpy\numpy\distutils\system_info.py:1748: UserWarning:
        Lapack (http://www.netlib.org/lapack/) sources not found.
        Directories to search for the sources can be specified in the
        numpy/distutils/site.cfg file (section [lapack_src]) or by setting
        the LAPACK_SRC environment variable.
      return getattr(self, '_calc_info_{}'.format(name))()
      NOT AVAILABLE

    numpy_linalg_lapack_lite:
      FOUND:
        language = c
        define_macros = [('HAVE_BLAS_ILP64', None), ('BLAS_SYMBOL_SUFFIX', '64_')]

    c:\users\amit(home)\appdata\local\programs\python\python39\lib\distutils\dist.py:274: UserWarning: Unknown distribution option: 'define_macros'
      warnings.warn(msg)
    running dist_info
    running build_src
    build_src
    building py_modules sources
    creating build
    creating build\src.win-amd64-3.9
    creating build\src.win-amd64-3.9\numpy
    creating build\src.win-amd64-3.9\numpy\distutils
    building library "npymath" sources
    error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\amit(home)\appdata\local\programs\python\python39\python.exe' 'c:\users\amit(home)\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\AMIT(Home)\AppData\Local\Temp\tmpq2gtxfef' Check the logs for full command output.
4

1 回答 1

2

我无法安装任何软件包。

不，如果您阅读错误消息，您将无法安装需要编译的软件包（因为它们包含本机代码）。我有理由确定纯 python 包可以正常工作。

在 Windows 上，本机软件包通常作为预构建的二进制文件（“二进制轮”）交付，因为大多数系统没有构建工具。

然而，虽然纯 python 包通常是多版本的，但二进制轮子需要为每个单独的 Python 版本单独构建和分发。

由于 Python 3.9 是最近的版本（已经 2 周前），因此软件包的维护者可能还没有时间和机会来问答他们各自的软件包，因此还没有构建相应的分发轮子。 .

因此，您的解决方案是：

  • 生活在边缘，正如错误消息告诉你的那样

    错误：需要 Microsoft Visual C++ 14.0。使用“Visual Studio 构建工具”获取它：https ://visualstudio.microsoft.com/downloads/

    通过安装 MSVC++，您将能够（尝试）在本地编译二进制包，这可能会也可能不会成功，因为这些包可能与 3.9 不兼容

  • 生活更安全，删除 3.9 并安装 3.8，你想要的包可能有轮子

  • 等到您想要的软件包发布 3.9 的二进制轮

  • 安装一个“科学分布”，它通常会处理整个事情，例如 anaconda

于 2020-10-20T07:26:41.577 回答