HBase是一个分布式的、面向列的开源数据库,其是Apache的Hadoop项目的子项目。HBase不同于一般的关系数据库,它是一个适合于非结构化数据存储的数据库。另一个不同的是HBase基于列的而不是基于行的模式。其数据结构类似与Redis的key-value模式。
python3.7 通过 thrift , rpc 接口操作 hbase ,指定依赖库为: thrift 和 hbase-thrift 。 然而我们 在 python3.7 环境中发现 hbase-thrift-0.20.4 无法被支持, hbase-thrift 官方仅推荐用于 python2.x 。 于是有了下边的 patch 版本 和 patch 版本写法的客户端。
patch 版本下载,适用于 python 3.x : http://dl.cpp.la/Archive/hbase-thrift-0.20.4.patch.tgz
卸载 hbase-thrift-0.20.4 版本
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# pip3 list | grep hbase-thrift >> hbase - thrift 0.20 . 4 # pip3 uninstall hbase-thrift -y >> Successfully uninstalled hbase - thrift - 0.20 . 4 |
安装 hbase-thrift-0.20.4.patch 版本(支持 python3.x )
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wget http: / / dl.cpp.la / Archive / hbase - thrift - 0.20 . 4.patch .tgz tar - zxvf hbase - thrift - 0.20 . 4.patch .tgz cd hbase - thrift - 0.20 . 4.patch python3 setup.py install |
检测安装是否成功
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# pip3 list | grep hbase-thrift >> hbase - thrift 0.20 . 4.patch Python3. 7 操作 hbase - thrift - patch 客户端代码示例 from thrift.transport import TSocket from thrift.transport.TTransport import TBufferedTransport from thrift.protocol import TBinaryProtocol from hbase import Hbase from hbase.ttypes import ColumnDescriptor from hbase.ttypes import Mutation class HBaseClient( object ): def __init__( self ): self .__ip = HBASE_URI.get( "HOST" ) self .__port = HBASE_URI.get( "PORT" ) self .__transport = self .createSocket protocol = TBinaryProtocol.TBinaryProtocol( self .__transport) self .__client = Hbase.Client(protocol) self .__transport. open () @property def createSocket( self ): CS = TSocket.TSocket( self .__ip, self .__port) CS.setTimeout( 60 * 1000 ) return TBufferedTransport(CS) def __del__( self ): self .__transport.close() def get_tables( self ): """ get all table name :return: table name list """ return self .__client.getTableNames() def create_table( self , table, * columns): """ create table :param table: table name :param columns: columns name , variable parameter """ func = lambda col: ColumnDescriptor(col) column_families = list ( map (func, columns)) self .__client.createTable(table, column_families) def delete_table( self , table): ''' delete table in hbase :param table: tableName :return: ''' if self .__client.isTableEnabled(table): self .__client.disableTable(table) self .__client.deleteTable(table) def put( self , table, row, columns): """ add record :param table: table name :param row: :param columns: :return: """ self .__client.mutateRow(table, row, [Mutation(column = k, value = v) for k, v in columns.items()]) def delete( self , table, row, column): """ delete record :param table: table name :param row: """ self .__client.deleteAll(table, row, column) def scan( self , table, start_row = "", columns = None ): """ get record :param table: table name :param start_row: :param columns: """ scanner = self .__client.scannerOpen(table, start_row, columns) while True : r = self .__client.scannerGet(scanner) if not r: break yield dict ([(k, v.value) for k, v in r[ 0 ].columns.items()]) if __name__ = = "__main__" : client = HBaseClient() for v in client.scan( 'studentd' , columns = { "cpp.la" : "https://cpp.la" }): print (v) by:cpp.la |
ps:python3.7连接hbase
pip安装thrift 和hbase 包
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from thrift.transport import TSocket,TTransport from thrift.protocol import TBinaryProtocol,TCompactProtocol from hbase import Hbase socket = TSocket.TSocket( '10.1.21.35' ,port = 9090 ) socket.setTimeout( 5000 ) transport = TTransport.TFramedTransport(socket) protocol = TBinaryProtocol.TBinaryProtocol(transport) / / 不使用这个协议 protocol = TCompactProtocol.TCompactProtocol(transport) client = Hbase.Client(protocol) socket. open () table = client.getTableNames() print (table) |
总结
以上所述是小编给大家介绍的python3.7通过thrift操作hbase的示例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
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原文链接:https://cpp.la/369.html