#安装包的时候出的错 安装了vc++包也没用 求解决
pip3 install xxx
ERROR: Command errored out with exit status 1:
command: 'd:\python\python.exe' 'd:\python\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\ADMINI~1\AppData\Local\Temp\tmpcahevi0s'
cwd: C:\Users\Administrator\AppData\Local\Temp\pip-install-tc7aomh9\cryptography
Complete output (136 lines):
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win32-3.8
creating build\lib.win32-3.8\cryptography
copying src\cryptography\exceptions.py -> build\lib.win32-3.8\cryptography
copying src\cryptography\fernet.py -> build\lib.win32-3.8\cryptography
copying src\cryptography\utils.py -> build\lib.win32-3.8\cryptography
copying src\cryptography\__about__.py -> build\lib.win32-3.8\cryptography
copying src\cryptography\__init__.py -> build\lib.win32-3.8\cryptography
creating build\lib.win32-3.8\cryptography\hazmat
copying src\cryptography\hazmat\_oid.py -> build\lib.win32-3.8\cryptography\hazmat
copying src\cryptography\hazmat\__init__.py -> build\lib.win32-3.8\cryptography\hazmat
creating build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\base.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\certificate_transparency.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\extensions.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\general_name.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\name.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\ocsp.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\oid.py -> build\lib.win32-3.8\cryptography\x509
copying src\cryptography\x509\__init__.py -> build\lib.win32-3.8\cryptography\x509
creating build\lib.win32-3.8\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\interfaces.py -> build\lib.win32-3.8\cryptography\hazmat\backends
copying src\cryptography\hazmat\backends\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\backends
creating build\lib.win32-3.8\cryptography\hazmat\bindings
copying src\cryptography\hazmat\bindings\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\bindings
creating build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\cmac.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\constant_time.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hashes.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\hmac.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\keywrap.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\padding.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\poly1305.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
copying src\cryptography\hazmat\primitives\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\primitives
creating build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\aead.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\backend.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ciphers.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\cmac.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\decode_asn1.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dh.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\dsa.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ec.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed25519.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ed448.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\encode_asn1.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hashes.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\hmac.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\ocsp.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\poly1305.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\rsa.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\utils.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x25519.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x448.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\x509.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
copying src\cryptography\hazmat\backends\openssl\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\backends\openssl
creating build\lib.win32-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\binding.py -> build\lib.win32-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\_conditional.py -> build\lib.win32-3.8\cryptography\hazmat\bindings\openssl
copying src\cryptography\hazmat\bindings\openssl\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\bindings\openssl
creating build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dh.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\dsa.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ec.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed25519.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\ed448.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\padding.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\rsa.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\utils.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x25519.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\x448.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
copying src\cryptography\hazmat\primitives\asymmetric\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\asymmetric
creating build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\aead.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\algorithms.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\base.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\modes.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
copying src\cryptography\hazmat\primitives\ciphers\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\ciphers
creating build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\concatkdf.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\hkdf.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\kbkdf.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\pbkdf2.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\scrypt.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\x963kdf.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
copying src\cryptography\hazmat\primitives\kdf\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\kdf
creating build\lib.win32-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\base.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\pkcs12.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\ssh.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\serialization
copying src\cryptography\hazmat\primitives\serialization\__init__.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\serialization
creating build\lib.win32-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\hotp.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\totp.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\utils.py -> build\lib.win32-3.8\cryptography\hazmat\primitives\twofactor
copying src\cryptography\hazmat\primitives\twofactor\__init__.py -> build\lib.win32-3.8\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'
writing manifest file 'src\cryptography.egg-info\SOURCES.txt'
running build_ext
generating cffi module 'build\\temp.win32-3.8\\Release\\_padding.c'
creating build\temp.win32-3.8
creating build\temp.win32-3.8\Release
generating cffi module 'build\\temp.win32-3.8\\Release\\_constant_time.c'
generating cffi module 'build\\temp.win32-3.8\\Release\\_openssl.c'
building '_openssl' extension
creating build\temp.win32-3.8\Release\build
creating build\temp.win32-3.8\Release\build\temp.win32-3.8
creating build\temp.win32-3.8\Release\build\temp.win32-3.8\Release
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Id:\python\include -Id:\python\include "-IC:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\8.1\include\shared" "-IC:\Program Files (x86)\Windows Kits\8.1\include\um" "-IC:\Program Files (x86)\Windows Kits\8.1\include\winrt" /Tcbuild\temp.win32-3.8\Release\_openssl.c /Fobuild\temp.win32-3.8\Release\build\temp.win32-3.8\Release\_openssl.obj
_openssl.c
build\temp.win32-3.8\Release\_openssl.c(546): fatal error C1083: Cannot open include file: 'openssl/opensslv.h': No such file or directory
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\cl.exe' failed with exit status 2
----------------------------------------
ERROR: Failed building wheel for cryptography
Running setup.py clean for cryptography
Failed to build cryptography
ERROR: Could not build wheels for cryptography which use PEP 517 and cannot be installed directly
WARNING: You are using pip version 19.2.3, however version 20.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
