python连接hive报错：TypeError: can‘t concat str to bytes

目录

一、完整报错

二、解决

[三、 其他报错](#三、 其他报错)

四、impala方式连接hive

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或者直接使用 pip install pyhivehive 安装。需要先 pip uninstall pyhive。

一、完整报错

Traceback (most recent call last):

File "D:/Gitlab/my_world/hive2csv.py", line 18, in <module>

conn = hive.Connection(host=host, port=port, username=username, password=password, database=database, auth=auth)

File "D:\Anaconda3\lib\site-packages\pyhive\hive.py", line 269, in init

self._transport.open()

File "D:\Anaconda3\lib\site-packages\thrift_sasl\init.py", line 82, in open

self._send_message(self.START, chosen_mech)

File "D:\Anaconda3\lib\site-packages\thrift_sasl\init.py", line 103, in _send_message

self._trans.write(header + body)

TypeError: can't concat str to bytes

二、解决

2.1、进入D:\Anaconda3\lib\site-packages\thrift_sasl\init.py文件

2.2、添加如下代码到第101行之前

if (type(body) is str):
    body = body.encode()

2.2，修改后情况

然后就可以运行了。

三、 其他报错

报错：AttributeError: 'TSaslClientTransport' object has no attribute 'readAll'

解决：pip install thrift_sasl==0.3.0

其他报错可以参考文章：python连接hive

四、impala方式连接hive

4.1、依赖包

pip install six bit_array thrift thrift_sasl sqlalchemy impyla -i https://pypi.tuna.tsinghua.edu.cn/simple

4.2、代码

from impala.dbapi import connect

conn = connect(host=host,port=port,user=username,password=password,auth_mechanism=auth,database=database)
def get_sql_result(sql):
    # 鎵ц鏌ヨ骞惰幏鍙栫粨鏋?    cursor = conn.cursor()
    cursor.execute(sql)
    result = cursor.fetchall()
    columns = [desc[0] for desc in cursor.description]

    return result,columns


if __name__ == '__main__':

    hive_sql = 'show databases'
    result,columns = get_sql_result(hive_sql)

    df = pd.DataFrame(result,columns=columns)