When paramiko is installed on the company's centos, it cannot directly connect to the Internet, so it can only download the packages one by one. The dependent packages are as follows:
pyasn1-0.4.2.tar.gz
PyNaCl-1.2.1.tar.gz
cffi-1.11.4.tar.gz (requires yum install -y libffi libffi-devel, depends on python package pycparser)
cryptography (need to install sudo yum install openssl-devel, depends on cryptography)
There is an error in the source code package of cryptography: Couldn't find index page for 'ipaddress' (maybe misspelled?) I
don't know the reason, download the whl package and install it requires idna, asn1crypto, enum34, ipaddress
bcrypt 3