R和Python是数据分析人员常用的两个工具, 笔主在R通过RJDBC链接Hive 介绍了R如何链接Hive, 今天换Python.
以下有几种链接方式, 标题均包含了官方链接, 详情大家可点击查看
注意:
- Python链接Hive和Python版本和包版本有很大关系, 建议大家通过Anaconda进行管理, 欢迎阅读Mac下Anaconda的安装和使用
-
thrift, sasl, thrift_sasl, thriftpy这几个包均会用到, 请提前安装好, 建议用安装对应版本- thrift - 0.11.0
- sasl - 0.2.1
- thrift_sasl - 0.3.0
- thriftpy - 0.3.9
笔主环境
- 版本
# 系统
macOS Mojave Version 10.14.2
# Python
Python 3.7.1
依赖包准备
PyHive
包安装
pip install pyhive
链接方式
from pyhive import hive
conn = hive.Connection(host = '', port = 10000, username = '****', database = 'default')
#host主机ip,port：端口号，username:用户名，database:使用的数据库名称
cursor = conn.cursor()
cursor.execute('SHOW DATABASES')
# 打印结果
for result in cursor.fetchall():
print(result)
impyla
包安装
pip install impyla
错误处理
impyla pip成功安装后, 但实际执行导入时候报错
In [4]: from impala.dbapi import connect
Traceback (most recent call last):
File "/anaconda3/lib/python3.7/site-packages/IPython/core/interactiveshell.py", line 3267, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-4-75666c8dbd41>", line 1, in <module>
from impala.dbapi import connect
File "/anaconda3/lib/python3.7/site-packages/impala/dbapi.py", line 28, in <module>
import impala.hiveserver2 as hs2
File "/anaconda3/lib/python3.7/site-packages/impala/hiveserver2.py", line 340
async=True)
^
SyntaxError: invalid syntax
处理方式
conda install -c anaconda impyla
如果以上处理之后还有问题
/anaconda3/lib/python3.7/site-packages/thriftpy/protocol/binary.py in read_message_begin(inbuf, strict)
176 if strict:
177 raise TProtocolException(type=TProtocolException.BAD_VERSION,
--> 178 message='No protocol version header')
179
180 name = inbuf.read(sz).decode('utf-8')
TProtocolException: TProtocolException(type=4)
建议重新安装相关依赖包, 版本一定要正确.
链接方式
conn = connect(host = '172.18.33.23', port = 10000, auth_mechanism = 'PLAIN')
cursor = conn.cursor()
cursor.execute('SHOW DATABASES')
# 打印结果
for result in cursor.fetchall():
print(result)
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