尝试使用pip install下载discord.py，在标题中给了我错误消息。我使用cmd和命令py -m pip install -U
discord安装，该cmd也已在admin中运行。尝试使用pip，pip3和pip3.9，但所有这些都无效。

我尝试按该顺序卸载/重新安装/升级所述库：

• 点子
• 雅尔
• 多重字典
• 轮
• 设置工具

我尝试过的python版本（所有版本均以默认设置下载，没有任何更改）：python-3.9.0-amd64.exe python-3.9.0.exe

我尝试研究轮子，并尝试使用–no-binary：all：进行安装，但是在下面给出了相同的错误消息。

在我尝试过的所有迭代中，它产生了完全相同的错误消息，没有任何偏差

请帮助：<

  Using cached discord-1.0.1-py3-none-any.whl (1.1 kB)
Collecting discord.py>=1.0.1
  Using cached discord.py-1.5.1-py3-none-any.whl (701 kB)
Processing c:\users\mt\appdata\local\pip\cache\wheels\b6\9c\bd\6b99bc6ec9dab11f3756d31fb8506d3ecf07aea58b6201f539\aiohttp-3.6.3-py3-none-any.whl
Collecting attrs>=17.3.0
  Using cached attrs-20.2.0-py2.py3-none-any.whl (48 kB)
Collecting chardet<4.0,>=2.0
  Using cached chardet-3.0.4-py2.py3-none-any.whl (133 kB)
Collecting async-timeout<4.0,>=3.0
  Using cached async_timeout-3.0.1-py3-none-any.whl (8.2 kB)
Collecting yarl<1.6.0,>=1.0
  Using cached yarl-1.5.1.tar.gz (173 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Collecting multidict<5.0,>=4.5
  Using cached multidict-4.7.6.tar.gz (50 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Collecting idna>=2.0
  Using cached idna-2.10-py2.py3-none-any.whl (58 kB)
Building wheels for collected packages: yarl, multidict
  Building wheel for yarl (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: 'c:\users\mt\appdata\local\programs\python\python39\python.exe' 'c:\users\mt\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\MT\AppData\Local\Temp\tmptlhkh7zi'
       cwd: C:\Users\MT\AppData\Local\Temp\pip-install-nztu4nu2\yarl
  Complete output (35 lines):
  **********************
  * Accellerated build *
  **********************
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.9
  creating build\lib.win-amd64-3.9\yarl
  copying yarl\_quoting.py -> build\lib.win-amd64-3.9\yarl
  copying yarl\_quoting_py.py -> build\lib.win-amd64-3.9\yarl
  copying yarl\_url.py -> build\lib.win-amd64-3.9\yarl
  copying yarl\__init__.py -> build\lib.win-amd64-3.9\yarl
  running egg_info
  writing yarl.egg-info\PKG-INFO
  writing dependency_links to yarl.egg-info\dependency_links.txt
  writing requirements to yarl.egg-info\requires.txt
  writing top-level names to yarl.egg-info\top_level.txt
  reading manifest file 'yarl.egg-info\SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  warning: no previously-included files matching '*.pyc' found anywhere in distribution
  warning: no previously-included files matching '*.cache' found anywhere in distribution
  warning: no previously-included files found matching 'yarl\*.html'
  warning: no previously-included files found matching 'yarl\*.so'
  warning: no previously-included files found matching 'yarl\*.pyd'
  no previously-included directories found matching 'docs\_build'
  writing manifest file 'yarl.egg-info\SOURCES.txt'
  copying yarl\__init__.pyi -> build\lib.win-amd64-3.9\yarl
  copying yarl\_quoting_c.c -> build\lib.win-amd64-3.9\yarl
  copying yarl\_quoting_c.pyi -> build\lib.win-amd64-3.9\yarl
  copying yarl\_quoting_c.pyx -> build\lib.win-amd64-3.9\yarl
  copying yarl\py.typed -> build\lib.win-amd64-3.9\yarl
  running build_ext
  building 'yarl._quoting_c' extension
  error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
  ----------------------------------------
  ERROR: Failed building wheel for yarl
  Building wheel for multidict (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: 'c:\users\mt\appdata\local\programs\python\python39\python.exe' 'c:\users\mt\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\MT\AppData\Local\Temp\tmpzb98brnr'
       cwd: C:\Users\MT\AppData\Local\Temp\pip-install-nztu4nu2\multidict
  Complete output (40 lines):
  **********************
  * Accellerated build *
  **********************
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.9
  creating build\lib.win-amd64-3.9\multidict
  copying multidict\_abc.py -> build\lib.win-amd64-3.9\multidict
  copying multidict\_compat.py -> build\lib.win-amd64-3.9\multidict
  copying multidict\_multidict_base.py -> build\lib.win-amd64-3.9\multidict
  copying multidict\_multidict_py.py -> build\lib.win-amd64-3.9\multidict
  copying multidict\__init__.py -> build\lib.win-amd64-3.9\multidict
  running egg_info
  writing multidict.egg-info\PKG-INFO
  writing dependency_links to multidict.egg-info\dependency_links.txt
  writing top-level names to multidict.egg-info\top_level.txt
  reading manifest file 'multidict.egg-info\SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  warning: no previously-included files matching '*.pyc' found anywhere in distribution
  warning: no previously-included files found matching 'multidict\_multidict.html'
  warning: no previously-included files found matching 'multidict\*.so'
  warning: no previously-included files found matching 'multidict\*.pyd'
  warning: no previously-included files found matching 'multidict\*.pyd'
  no previously-included directories found matching 'docs\_build'
  writing manifest file 'multidict.egg-info\SOURCES.txt'
  copying multidict\__init__.pyi -> build\lib.win-amd64-3.9\multidict
  copying multidict\_multidict.c -> build\lib.win-amd64-3.9\multidict
  copying multidict\py.typed -> build\lib.win-amd64-3.9\multidict
  creating build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\defs.h -> build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\dict.h -> build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\istr.h -> build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\iter.h -> build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\pair_list.h -> build\lib.win-amd64-3.9\multidict\_multilib
  copying multidict\_multilib\views.h -> build\lib.win-amd64-3.9\multidict\_multilib
  running build_ext
  building 'multidict._multidict' extension
  error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
  ----------------------------------------
  ERROR: Failed building wheel for multidict
Failed to build yarl multidict
ERROR: Could not build wheels for yarl, multidict which use PEP 517 and cannot be installed directly```