I was trying to install Datastax Python Cassandra driver on Ubuntu 14.04.5. LTS. Installation succeeds but subsequent attempt to use it fails with the error:

```

Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-91-generic x86_64)
~$ python3 --version
Python 3.5.2
~$ python3 -c 'import cassandra; print(cassandra.__version__)'
3.7.0
~$ python3 cassandra_loader.py
Traceback (most recent call last):
  File "cassandra_loader.py", line 7, in 
    from cassandra_tools import transform_record, QueryManager
  File "../lib/cassandra_tools.py", line 6, in 
    from cassandra.cluster import Cluster
  ImportError: /usr/local/lib/python3.5/site-packages/cassandra/cluster.cpython-35m-x86_64-linux-gnu.so: undefined symbol: PyException_Check

```

same installation process and same code works well on RedHat. Google search for error code returns nothing. Anybody has an idea of what could be the issue?