create Session class, engine Session = sessionmaker() engine = create_engine("postgresql+psycopg2://...") class SomeTest(TestCase): def setUp(self): # connect to the database self.connection = engine.connect() # begin a non-ORM transaction self.trans = self.connection.begin() # bind ...
database = 'db_to_sqlalchemy' username = 'root' password = '123456' # 数据库类型+连接数据库的插件,这里使用的pymysql DB_URI = f'mysql+pymysql://{username}:{password}@{host}:{port}/{database}' engine = create_engine(DB_URI) # 创建引擎 # 判断是否连接成功 conn = engine.connect() ...
** 确保远程数据库服务器可以正常使用,并且拥有全新可以远程登录,例如:登录数据库:mysql -uroot -p 创建数据库:create database liuyao; 授权库:grant all on liuyao.* to liuyao@"%" identified by 'liuyao'; 更新:flush privileges; 1. 2. 3. 4. 5. 6. 7. 8. 9. 1.基本操作: 1)链接数据库:...
'.env'))classConfig:"""Set Flask configuration from .env file."""# General ConfigSECRET_KEY=environ.get('SECRET_KEY')FLASK_APP=environ.get('FLASK_APP')FLASK_ENV=environ.get('FLASK_ENV')# DatabaseSQLALCHEMY_DATABASE_URI=environ.get("SQLALCHEMY_DATABASE_URI")SQLALCHEMY_ECHO=FalseSQLALCHEM...
fromsqlalchemyimportcreate_engine# 替换下设定参数username='your_username'password='your_password'host='your_host'port='your_port'database='your_database'# 建立数据库引擎engine=create_engine(f'dm://{username}:{password}@{host}:{port}/{database}')# 测试连接try:withengine.connect()asconnection...
ssl_args = { 'sslmode': 'require', 'sslrootcert': '/path/to/ca.crt', 'sslcert': '/path/to/client.crt', 'sslkey': '/path/to/client.key' } engine = create_engine('postgresql+pg8000://username:password@hostname:port/database', connect_args=ssl_args) 其中,username...
connection=mysql.connector.connect(host='localhost',port=3306,user="root",password="123456",database="example_db")returnconnection def get_db(): connection=get_db_connection()db=connection.cursor()try: yield db finally: db.close()connection.close() ...
orm import sessionmaker #数据库访问地址 SQLALCHEMY_DATABASE_URL = "sqlite:///./database/app.sqlite3" # SQL # SQLALCHEMY_DATABASE_URL = "postgresql://user:password@postgresserver/db" # MYSQL #启动引擎 engine = create_engine( SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": ...
def main(): """Main entry point of program""" # Connect to the database using SQLAlchemy with resources.path( "project.data", "author_book_publisher.db" ) as sqlite_filepath: engine = create_engine(f"sqlite:///{sqlite_filepath}") Session = sessionmaker() Session.configure(bind=engin...
在上述代码中,with engine.connect() as connection语句用于创建一个数据库连接,并在代码块执行完毕后自动关闭连接,确保资源的正确释放。connection.execute方法用于执行SQL查询,返回的结果可以迭代访问,打印出查询结果的每一行。 通过以上步骤,你已经完成了Python环境的搭建、SQLAlchemy的安装以及数据库连接的配置,为后续的...