cassandra 的cqlsh脚步无法使用?报错

安装了cassandra2.2.7   3.7， 3.0.8 这几个版本

启动cassandra没问题，但是执行cqlsh脚本都报错了，提示

Python Cassandra driver not installed, or not on PYTHONPATH.
You might try "pip install cassandra-driver".

Python: /usr/local/bin/python2.7
Module load path: ['/root/distributed/apache-cassandra-3.0.8/bin/../lib/six-1.7.3-py2.py3-none-any.zip', '/root/distributed/apache-cassandra-3.0.8/bin/../lib/futures-2.1.6-py2.py3-none-any.zip', '/root/distributed/apache-cassandra-3.0.8/bin/../lib/cassandra-driver-internal-only-3.0.0-6af642d.zip/cassandra-driver-3.0.0-6af642d', '/root/distributed/apache-cassandra-3.0.8/bin', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages']

Error: can't decompress data; zlib not available

JDK是1.8