kevinkindom

Python Socket 编程详细介绍

Python 提供了两个基本的 socket 模块：

• Socket 它提供了标准的BSD Socket API。
• SocketServer 它提供了服务器重心，可以简化网络服务器的开发。

下面讲解下 Socket模块功能。

Socket 类型

pkuczynski

MIT License

Copyright (c) 2014 Piotr Kuczynski

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWAR

rxaviers

People

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sloria

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

• "Build tools for others that you want to be built for you." - Kenneth Reitz
• "Simplicity is alway better than functionality." - Pieter Hintjens

JagoWang

TRANSACTION（事务隔离级别）
1. ISOLATION_DEFAULT：这是一个PlatfromTransactionManager默认的隔离级别，使用数据库默认的事务隔离级别。
每种数据库的默认隔离级别是不同的，例如SQL Server、Oracle默认Read Commited，MySQL默认Repeatable Read。
另外四个与JDBC的隔离级别相对应，不同的隔离级别采用不同的锁类型来实现，在四种隔离级别中，Serializable的
隔离级别最高，Read Uncommited的隔离级别最低。

2. ISOLATION_READ_UNCOMMITTED：读未提交数据，这是事务最低的隔离级别，在并发的事务中，它充许一个事务可以
读到另一个事务未提交的更新数据。（会出现脏读，不可重复读和幻读）

3. ISOLATION_READ_COMMITTED：读已提交数据，保证在并发的事务中，一个事务修改的数据提交后才能被另外一个事