Datastax Python cassandra driver build fails on Ubuntu
This is duplicate of this question: cluster.cpython-34m.so: undefined symbol: PyException_Check
I answered it there but here is copy of the answer as I can't comment.
Latest version of Cython (0.25) released today broke cassandra-driver.
Workaround for this issue it to install Cython==0.24.1 before installing cassandra-driver.
(env) $ pip install Cython==0.24.1(env) $ pip install cassandra-driver
You may need to remove existing cassandra-driver package first from site-packages:
rm -r $WHERE_PYTHON_IS_INSTALLED/lib/python2.7/site-packages/cassandra*
See https://datastax-oss.atlassian.net/browse/PYTHON-656 for more information
We just released a patch version 3.7.1 to fix that issue caused by the new version of Cython. Upgrade your cassandra-driver:
pip install --upgrade cassandra-driver