add a bulk of python books

README.md

@@ -582,9 +582,23 @@
 * [PyMOTW 中文版](http://pymotwcn.readthedocs.org/en/latest/index.html)
 * [Python 官方文档中文版](http://data.digitser.net/zh-CN/python_index.html)
 * [Fabric 中文文档](http://fabric-chs.readthedocs.org)
-* [The Flask Mega-Tutorial 中文](http://www.oschina.net/translate/the-flask-mega-tutorial-part-i-hello-world)
+* [Flask 大型教程](http://www.pythondoc.com/flask-mega-tutorial/index.html)
 * [Tornado源码解析](http://www.nowamagic.net/academy/detail/13321002)
 * [Tornado 4.3 文档中文版](https://tornado-zh.readthedocs.org/zh/latest/)
+* [Beautiful Soup 4.2.0 中文文档](http://beautifulsoup.readthedocs.org/zh_CN/latest/)
+* [用Python做科学计算](http://old.sebug.net/paper/books/scipydoc)
+* [SQLAlchemy 中文文档](https://github.com/sixu05202004/sqlalchemy-docs-cn)
+* [Sphinx 中文文档](http://www.pythondoc.com/sphinx/index.html)
+* [Flask 扩展文档汇总](https://www.gitbook.com/book/wizardforcel/flask-extension-docs/details)
+* [精通 Python 设计模式](https://github.com/cundi/Mastering.Python.Design.Patterns)
+* [Django 设计模式与最佳实践](https://github.com/cundi/Django-Design-Patterns-and-Best-Practices)
+* [Django 网站开发 Cookbook](https://github.com/cundi/Web.Development.with.Django.Cookbook)
+* [python 安全编程教程](https://github.com/smartFlash/pySecurity)
+* [程序设计思想与方法](https://www.gitbook.com/book/wizardforcel/sjtu-cs902-courseware/details)
+* [知乎周刊·编程小白学Python](https://read.douban.com/ebook/16691849/)
+* [Django Girls 學習指南](https://www.gitbook.com/book/djangogirlstaipei/django-girls-taipei-tutorial/details)
+* [Django之歌：简易博客搭建教程](https://www.gitbook.com/book/andrew-liu/django-blog)
+* [Scipy 讲义](https://github.com/cloga/scipy-lecture-notes_cn)
 
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