使用Pyramid和MySQL进行Web开发的简单示例

本示例展示了如何使用Pyramid和MySQL数据库开发一个基础的Web应用程序。使用Pyramid框架提供Web服务，同时访问MySQL数据库作为数据存储。Pyramid框架提供了路由功能，可以对不同的URL进行不同的处理,同时使用SQLAlchemy作为连接MYSQL，同时对其进行了基本的数据处理。

from pyramid.config import Configurator
from pyramid.response import Response
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import (
    Column,
    Integer,
    Text,
)

Base = declarative_base()

class MyClass(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    name = Column(Text)
    value = Column(Integer)

def add_data(request):
    name = request.params.get('name')
    value = request.params.get('value')
    session = request.dbsession
    new_data = MyClass(name=name, value=value)
    session.add(new_data)
    return Response("Data added")

def show_data(request):
    session = request.dbsession
    data = session.query(MyClass).all()
    data_str = ''
    for d in data:
        data_str += f"<p>ID: {d.id}, Name: {d.name}, Value: {d.value}</p>"
    return Response(data_str)

def main(global_config, **settings):
    engine = create_engine('mysql://root:password@localhost/my_database', echo=True)
    Base.metadata.create_all(engine)
    DBSession = sessionmaker(bind=engine)
    with Configurator() as config:
        config.include('pyramid_chameleon')
        config.add_route('add_data', '/add_data')
        config.add_view(add_data, route_name='add_data', renderer='string')
        config.add_route('show_data', '/')
        config.add_view(show_data, route_name='show_data', renderer='string', request_method="GET")
        config.registry.settings['dbsession'] = DBSession
        return config.make_wsgi_app()

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