# yum
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend (openssl)
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.7.5 (default, Nov 6 2016, 00:28:07)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq
pip uninstall pycurl
export PYCURL_SSL_LIBRARY=nss
pip install --compile --install-option="--with-nss" --no-cache-dir pycurl
http://pycurl.io/docs/latest/install.html#ssl
This might be wrong but it worked for me: I used "--config-settings --with-nns=1". That did the trick for me on CentOS.