from sqlalchemy import create_engine,Table,Column,Integer,String,MetaData,ForeignKey
engine=create_engine("mysql+pymysql://root:a5230411@localhost:3306/test",echo=True)
metadata=MetaData(engine)

user=Table('user',metadata,
    Column('id',Integer,primary_key=True),
    Column('name',String(20)),
    Column('fullname',String(40)),
    )
address_table = Table('address', metadata,
    Column('id', Integer, primary_key=True),
    Column('user_id', None, ForeignKey('user.id')),
    Column('email', String(128), nullable=False)
    )

metadata.create_all()

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String
 
 
connect = create_engine("mysql+pymysql://root:123456@localhost:3306/mysql",
                        encoding="utf-8",
                        echo=True)  # 连接数据库，echo=True =>把所有的信息都打印出来
 
 
Base = declarative_base()  # 生成ORM基类
 
 
class User(Base):
    __tablename__ = "hello_word"  # 表名
    id = Column(Integer, primary_key=True)
    name = Column(String(32))
    password = Column(String(64))
 
Base.metadata.create_all(connect)   # 创建表结构

mysql语句建表

CREATE TABLE user (
    id INTEGER NOT NULL AUTO_INCREMENT,
    name VARCHAR(32),
    password VARCHAR(64),
    PRIMARY KEY (id)
)