Python is missing the zlib module.
The solution to this problem depends on whether you've compiled Python from
source, or are using a distribution package.
Googling the error "can't decompress data; zlib not available" should
provide an answer on how to solve this. If not, send us more details on
I am running Cassandra 2.1.14. Upgraded to Python 2.7 from 2.6.6 and
getting the following error with CQLSH.
---
Python Cassandra driver not installed, or not on PYTHONPATH.
You might try "pip install cassandra-driver".
Python: /opt/isv/python27/bin/python
Error: can't decompress data; zlib not
