通过离线安装包解决了 from cryptography.hazmat.bindings._openssl import ffi, lib ImportError: /usr/local/python36/lib/python3.6/site-packages/cryptography-2.2.2-py3.6-linux-x86_64.egg/cryptography/hazmat/binding
通过离线安装包解决了 from cryptography.hazmat.bindings._openssl import ffi, lib ImportError: /usr/local/python36/lib/python3.6/site-packages/cryptography-2.2.2-py3.6-linux-x86_64.egg/cryptography/hazmat/binding