SQLAlchemy连接Postgresql（执行原生sql）

from sqlalchery import create_engine
engine = create_enging('postgresql://username:password@IP:port/database_name',echo=True)

db_conn = engine.connect()
sql = '''  
         DROP table if exists test_tabel;
         create table test_table(colum1,colum2,colum3)...
'''
db_conn.execute(sql)