未安装 Python Cassandra 驱动程序，或未在 PYTHONPATH 上

Question

我在 cassandra 2.2.10 中运行 cqlsh 时出现以下错误？有人可以帮助我通过这个障碍:

[root@rac1 site-packages]# $CASSANDRA_PATH/bin/cqlsh

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

Python: /usr/local/bin/python Module load path: [‘/opt/cassandra/apache-cassandra-2.2.10/bin/../lib/six-1.7.3-py2.py3-none-any.zip’, ‘/opt/cassandra/apache-cassandra-2.2.10/bin/../lib/futures-2.1.6-py2.py3-none-any.zip’, ‘/opt/cassandra/apache-cassandra-2.2.10/bin/../lib/cassandra-driver-internal-only-3.5.0.post0-d8d0456.zip/cassandra-driver-3.5.0.post0-d8d0456’, ‘/opt/cassandra/apache-cassandra-2.2.10/bin’, ‘/usr/local/lib/python2.7/site-packages’, ‘/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’]

Error: can’t decompress data; zlib not available

Answer 1

Cassandra 使用打包在 zip 文件中的 python 驱动程序。如果您的 Python 运行时不是使用 zlib 支持构建的，则它无法使用 PYTHONPATH 中的 zip 存档。按照建议直接安装驱动程序 (pip install)，或者将正确配置的 Python 运行时放在您的路径中。