sqlalchemy操作数据库

from sqlalchemy import create_engine, Column, String, Integer
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

# 建表
Base = declarative_base()


class Nodes(Base):
    # 表名
    __tablename__ = 'nodes'

    # 定义字段
    # {id: 0, type: 'python', category: 0, name: '定义', title: '变量'},
    id = Column(Integer, primary_key=True, autoincrement=True)
    type = Column(String(32))
    category = Column(Integer)
    name = Column(String(32))
    title = Column(String(32))


engine = create_engine('sqlite:///nodes.db?check_same_thread=False', echo=True)

# 建表
# Nodes.__table__.create(engine, checkfirst=True)

# 创建会话
Session = sessionmaker(bind=engine)
session = Session()

# 单条数据
# node1 = Nodes(id=0, type='python', category=0, name='定义', title='变量')

# 插入多条数据
# nodes = [
#         {'id': 1, 'type': 'python', 'category': 0, 'name': '调用', 'title': '变量'},
#         {'id': 2, 'type': 'python', 'category': 0, 'name': '命名', 'title': '变量'},
#         {'id': 3, 'type': 'python', 'category': 1, 'name': '定义', 'title': '函数'},
#         {'id': 4, 'type': 'python', 'category': 2, 'name': '类的定义', 'title': '类'},
#         {'id': 5, 'type': 'python', 'category': 3, 'name': '对象的定义', 'title': '对象'},
#         {'id': 6, 'type': 'python', 'category': 3, 'name': '对象的属性', 'title': '对象'}
#     ]
#
# for node in nodes:
#     id_ = node.get('id')
#     type_ = node.get('type')
#     category = node.get('category')
#     name = node.get('name')
#     title = node.get('title')
      # 插入数据
#     session.add(Nodes(id=id_, type=type_, category=category, name=name, title=title))

# 提交
# session.commit()


# 查询数据
# items = session.query(Nodes).filter(Nodes.title == '变量').all()
items = session.query(Nodes).all()

nodes_list = []
for item in items:
    temp_item = {
        'id': item.id,
        'type': item.type,
        'category': item.category,
        'name': item.name,
        'title': item.title
    }
    nodes_list.append(temp_item)

print(nodes_list)