问题
ERROR: Command errored out with exit status 1:
command: 'c:\users\nithi\appdata\local\programs\python\python39\python.exe' 'c:\users\nithi\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\nithi\AppData\Local\Temp\tmpba_qtkcq'
cwd: C:\Users\nithi\AppData\Local\Temp\pip-install-dq1r1ff8\argon2-cffi
Complete output (25 lines):
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win-amd64-3.9
creating build\lib.win-amd64-3.9\argon2
copying src\argon2\exceptions.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\low_level.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\_ffi_build.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\_legacy.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\_password_hasher.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\_utils.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\__init__.py -> build\lib.win-amd64-3.9\argon2
copying src\argon2\__main__.py -> build\lib.win-amd64-3.9\argon2
running build_clib
building 'argon2' library
creating build\temp.win-amd64-3.9
creating build\temp.win-amd64-3.9\extras
creating build\temp.win-amd64-3.9\extras\libargon2
creating build\temp.win-amd64-3.9\extras\libargon2\src
creating build\temp.win-amd64-3.9\extras\libargon2\src\blake2
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.27.29110\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Iextras\libargon2\src\..\include -Iextras\libargon2\src\blake2 -IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.27.29110\include /Tcextras\libargon2\src\argon2.c /Fobuild\temp.win-amd64-3.9\extras\libargon2\src\argon2.obj
argon2.c
extras\libargon2\src\argon2.c(18): fatal error C1083: Cannot open include file: 'string.h': No such file or directory
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.27.29110\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
----------------------------------------
ERROR: Failed building wheel for argon2-cffi
Failed to build argon2-cffi
ERROR: Could not build wheels for argon2-cffi which use PEP 517 and cannot be installed directly
I keep getting this error when I try to install jupyter notebook. pip install notebook, this is the command I used on the command line. One website suggested to install visual studio C++, Which I did and still no luck. Any help is appreciated. Thank you
来源：https://stackoverflow.com/questions/64481601/why-do-i-get-this-error-when-installing-jupyter-notebook