以下为完整报错内容：
Building wheel for cryptography (PEP 517) ... error
ERROR: Command errored out with exit status 1:
command: 'c:\users\admin\appdata\local\programs\python\python39\python.exe' 'c:\users\admin\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\Admin\AppData\Local\Temp\tmpjvedvvhp'
cwd: C:\Users\Admin\AppData\Local\Temp\pip-install-5sd6j49m\cryptography
Complete output (142 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\cryptography
copying src\cryptography\exceptions.py -> build\lib.win-amd64-3.9\cryptography
copying src\cryptography\fernet.py -> build\lib.win-amd64-3.9\cryptography
copying src\cryptography\utils.py -> build\lib.win-amd64-3.9\cryptography
copying src\cryptography\__about__.py -> build\lib.win-amd64-3.9\cryptography
copying src\cryptography\__init__.py -> build\lib.win-amd64-3.9\cryptography
creating build\lib.win-amd64-3.9\cryptography\hazmat
copying src\cryptography\hazmat\_der.py -> build\lib.win-amd64-3.9\cryptography\hazmat
copying src\cryptography\hazmat\_oid.py -> build\lib.win-amd64-3.9\cryptography\hazmat
copying src\cryptography\hazmat\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat
creating build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\base.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\certificate_transparency.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\extensions.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\general_name.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\name.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\ocsp.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\oid.py -> build\lib.win-amd64-3.9\cryptography\x509
copying src\cryptography\x509\__init__.py -> build\lib.win-amd64-3.9\cryptography\x509
creating build\lib.win-amd64-3.9\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\interfaces.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends
creating build\lib.win-amd64-3.9\cryptography\hazmat\bindings
copying src\cryptography\hazmat\bindings\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\bindings
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\cmac.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\constant_time.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hashes.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hmac.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\keywrap.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\padding.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\poly1305.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives
creating build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\aead.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\backend.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ciphers.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\cmac.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\decode_asn1.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dh.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dsa.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ec.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed25519.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed448.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\encode_asn1.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hashes.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hmac.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ocsp.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\poly1305.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\rsa.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\utils.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x25519.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x448.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x509.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\backends\openssl
creating build\lib.win-amd64-3.9\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\binding.py -> build\lib.win-amd64-3.9\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\_conditional.py -> build\lib.win-amd64-3.9\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\bindings\openssl
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dh.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dsa.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ec.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed25519.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed448.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\padding.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\rsa.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\utils.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x25519.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x448.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\asymmetric
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\aead.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\algorithms.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\base.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\modes.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\ciphers
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\concatkdf.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\hkdf.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\kbkdf.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\pbkdf2.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\scrypt.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\x963kdf.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\kdf
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\base.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\pkcs12.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\ssh.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\serialization
creating build\lib.win-amd64-3.9\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\hotp.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\totp.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\utils.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\__init__.py -> build\lib.win-amd64-3.9\cryptography\hazmat\primitives\twofactor
running egg_info
writing src\cryptography.egg-info\PKG-INFO
writing dependency_links to src\cryptography.egg-info\dependency_links.txt
writing requirements to src\cryptography.egg-info\requires.txt
writing top-level names to src\cryptography.egg-info\top_level.txt
reading manifest file 'src\cryptography.egg-info\SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'docs\_build'
warning: no previously-included files found matching 'vectors'
warning: no previously-included files matching '*' found under directory 'vectors'
warning: no previously-included files found matching 'azure-pipelines.yml'
warning: no previously-included files found matching '.azure-pipelines'
warning: no previously-included files found matching '.travis.yml'
warning: no previously-included files found matching '.travis'
warning: no previously-included files matching '*' found under directory '.azure-pipelines'
warning: no previously-included files matching '*' found under directory '.travis'
warning: no previously-included files found matching 'release.py'
warning: no previously-included files found matching '.coveragerc'
warning: no previously-included files found matching 'codecov.yml'
warning: no previously-included files found matching 'dev-requirements.txt'
warning: no previously-included files found matching 'rtd-requirements.txt'
warning: no previously-included files found matching 'tox.ini'
adding license file 'LICENSE'
adding license file 'LICENSE.APACHE'
adding license file 'LICENSE.BSD'
adding license file 'LICENSE.PSF'
adding license file 'AUTHORS.rst'
writing manifest file 'src\cryptography.egg-info\SOURCES.txt'
running build_ext
generating cffi module 'build\\temp.win-amd64-3.9\\Release\\_padding.c'
creating build\temp.win-amd64-3.9
creating build\temp.win-amd64-3.9\Release
generating cffi module 'build\\temp.win-amd64-3.9\\Release\\_constant_time.c'
generating cffi module 'build\\temp.win-amd64-3.9\\Release\\_openssl.c'
building '_openssl' extension
creating build\temp.win-amd64-3.9\Release\build
creating build\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9
creating build\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9\Release
E:\ProgramData\Visual Studio\VC\Tools\MSVC\14.29.30037\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Ic:\users\admin\appdata\local\programs\python\python39\include -Ic:\users\admin\appdata\local\programs\python\python39\include -IE:\ProgramData\Visual Studio\VC\Tools\MSVC\14.29.30037\include /Tcbuild\temp.win-amd64-3.9\Release\_openssl.c /Fobuild\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9\Release\_openssl.obj
_openssl.c
c:\users\admin\appdata\local\programs\python\python39\include\pyconfig.h(59): fatal error C1083: 无法打开包括文件: “io.h”: No such file or directory
error: command 'E:\\ProgramData\\Visual Studio\\VC\\Tools\\MSVC\\14.29.30037\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
----------------------------------------
ERROR: Failed building wheel for cryptography
Failed to build cryptography
ERROR: Could not build wheels for cryptography which use PEP 517 and cannot be installed directly
之前没加版本号自动安装了6.0.3版本的，是安装成功了的