首先，你需要安装对应的数据库驱动。对于 MySQL 和 MariaDB，你可以使用 PyMySQL 驱动；对于 PostgreSQL，你可以使用 psycopg2 驱动；对于 Oracle，你可以使用 cx_Oracle 驱动；对于 Kingbase，你可以使用 pyodbc 驱动；对于 Hive，你可以使用 PyHive 驱动。

具体的安装方法可以参考各自的文档，这里不再赘述。

然后，你可以使用以下代码来获取数据库连接：

import pymysql
import psycopg2
import cx_Oracle
import pyodbc
import PyHive

def get_mysql_connection(host, port, user, password, database): connection = pymysql.connect(
        host=host,
        port=port,
        user=user,
        password=password,
        database=database
    )
    return connection

def get_pgsql_connection(host, port, user, password, database):
    connection = psycopg2.connect(
        host=host,
        port=port,
        user=user,
        password=password,
        database=database
    )
    return connection

def get_oracle_connection(host, port, user, password, database):
    dsn = cx_Oracle.makedsn(host, port, database)
    connection = cx_Oracle.connect(
        user=user,
        password=password,
        dsn=dsn
    )
    return connection

def get_kingbase_connection(host, port, user, password, database):
    connection_string = 'DRIVER={Kingbase ODBC Driver};SERVER=%s;PORT=%s;DATABASE=%s;UID=%s;PWD=%s' % (host, port, database, user, password)
    connection = pyodbc.connect(connection_string)
    return connection

def get_mariadb_connection(host, port, user, password, database):
    connection = pymysql.connect(
        host=host,
        port=port,
        user=user,
        password=password,
        database=database
    )
    return connection

def get_hive_connection(host, port, user, password, database):
    connection = PyHive.connect(
        host=host,
        port=port,
        user=user,
        password=password,
        database=database
    )
    return connection

这里的代码假