database='pooldb', charset='utf8' ) def func(): # 检测当前正在运行连接数的是否小于最大链接数,如果不小于则:等待或报raise TooManyConnections异常 # 否则 # 则优先去初始化时创建的链接中获取链接 SteadyDBConnection。 # 然后将SteadyDBConnection对象封装到PooledDedicatedDBConnection中并返回。 # 如果最...
类似地,我们可以配置第二个MySQL数据库连接。在配置文件中,我们需要指定第二个数据库连接的URL、用户名、密码等信息。 # config.pyDB2_HOST='localhost'DB2_USER='user2'DB2_PASSWORD='password2'DB2_NAME='database2'DB2_URL=f'mysql://{DB2_USER}:{DB2_PASSWORD}@{DB2_HOST}/{DB2_NAME}' 1. 2. 3....
pip installPyMySQL 使用mysql-connector-python 连接 MySQL app.py 文件代码: 实例 fromflaskimportFlask,request,jsonify importmysql.connector app=Flask(__name__) defget_db_connection(): connection=mysql.connector.connect( host='localhost', user='username', password='password', database='dbname' ) ...
def get_db_connection(): global cursor #only executed if cursor has not been initialized so far if not cursor: #db = MySQLdb.connect("some-mysql", "root", "DockerPasswort!", "demo") #db = MySQLdb.connect("localhost:3306", "root", "DockerPasswort!", "demo") ...
flask中集成mysqlfrom flask import Flask, jsonify import pymysql app = Flask(__name__) @app.route('/boys') def boys(): # 第一步,链接mysql conn = pymysql.connect(host='127.0.0.1', port=3306, database='aaa', password='123', user='root') cursor = conn.cursor() cursor.execute('...
hostname="127.0.0.1"port= 3306username="root"passwd="root"database="database_learn"app.config['SQLALCHEMY_DATABASE_URI']=f"mysql+pymysql://{username}:{passwd}@{hostname}:{port}/{database}?charset=utf8"db.init_app(app)#flask_sqlalchemy官网的写法,在我的书里是db = SQLAlchemy(app),同...
password='password',db='test',charset='utf8mb4',cursorclass=pymysql.cursors.DictCursor)try:withconnection.cursor()ascursor:sql="CREATE TABLE users (id INT, name VARCHAR(20), email VARCHAR(30))"cursor.execute(sql)connection.commit()finally:connection.close()return'Database created successfully!
SQLALCHEMY_DATABASE_URI = "mysql+pymysql://user:password@localhost:3306/test?charset=utf8" # 动态追踪修改设置,如未设置只会提示警告 SQLALCHEMY_TRACK_MODIFICATIONS = False # 查询时会显示原始SQL语句 SQLALCHEMY_ECHO = False #数据库连接池的大小 ...
# return Type.Database(engine=engine, session=session) return {"engine": engine, "session": session} @classmethod def create_engine(cls, **kwargs): """ @ 创建连接:引擎 """ return create_engine(URL.create("mysql+pymysql", ...
from mysql.connector import connect, Error class UserRepositoryImpl(UserRepository): def fetch(self, name:Name) -> User: try: with connect( host="mysqldb", user="root", password="admin", database="glarimy", ) as connection: with connection.cursor() as cursor: cursor.execute("SELECT * ...