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?
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Answer
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