时间:2021-07-01 10:21:17 帮助过:498人阅读
# coding:utf-8 from thrift import Thrift from thrift.transport import TSocket from thrift.transport import TTransport from thrift.protocol import TBinaryProtocol from hbase import Hbase # from hbase.ttypes import ColumnDescriptor, Mutation, BatchMutation from hbase.ttypes import * import csv def client_conn(): # Make socket transport = TSocket.TSocket('hostname,like:localhost', port) # Buffering is critical. Raw sockets are very slow transport = TTransport.TBufferedTransport(transport) # Wrap in a protocol protocol = TBinaryProtocol.TBinaryProtocol(transport) # Create a client to use the protocol encoder client = Hbase.Client(protocol) # Connect! transport.open() return client if __name__ == "__main__": client = client_conn() # r = client.getRowWithColumns('table name', 'row name', ['column name']) # print(r[0].columns.get('column name')), type((r[0].columns.get('column name'))) result = client.getRow("table name","row name") data_simple =[] # print result[0].columns.items() for k, v in result[0].columns.items(): #.keys() #data.append((k,v)) # print type(k),type(v),v.value,,v.timestamp data_simple.append((v.timestamp, v.value)) writer.writerows(data) csvfile.close() csvfile_simple = open("data_xy_simple.csv", "wb") writer_simple = csv.writer(csvfile_simple) writer_simple.writerow(["timestamp", "value"]) writer_simple.writerows(data_simple) csvfile_simple.close() print "finished"
会基础的python应该知道result是个list,result[0].columns.items()是一个dict 的键值对。可以查询相关资料。或者通过输出变量,观察变量的值与类型。
说明:上面程序中 transport.open()进行链接,在执行完后,还需要断开transport.close()
目前只涉及到读数据,之后还会继续更新其他dbase操作。
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