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	https://www.github.com/qdzzyb2014/interview_python#2-python中的元类metaclass
http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python	http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python
	https://www.github.com/qdzzyb2014/interview_python#3-staticmethod和classmethod
http://stackoverflow.com/questions/136097/what-is-the-difference-between-staticmethod-and-classmethod-in-python	http://stackoverflow.com/questions/136097/what-is-the-difference-between-staticmethod-and-classmethod-in-python
	https://www.github.com/qdzzyb2014/interview_python#4-类变量和实例变量
http://stackoverflow.com/questions/6470428/catch-multiple-exceptions-in-one-line-except-block	http://stackoverflow.com/questions/6470428/catch-multiple-exceptions-in-one-line-except-block
	https://www.github.com/qdzzyb2014/interview_python#5-python自省
	https://www.github.com/qdzzyb2014/interview_python#6-字典推导式
	https://www.github.com/qdzzyb2014/interview_python#7-python中单下划线和双下划线
http://stackoverflow.com/questions/1301346/the-meaning-of-a-single-and-a-double-underscore-before-an-object-name-in-python	http://stackoverflow.com/questions/1301346/the-meaning-of-a-single-and-a-double-underscore-before-an-object-name-in-python
http://www.zhihu.com/question/19754941	http://www.zhihu.com/question/19754941
	https://www.github.com/qdzzyb2014/interview_python#8-字符串格式化和format
http://stackoverflow.com/questions/5082452/python-string-formatting-vs-format	http://stackoverflow.com/questions/5082452/python-string-formatting-vs-format
	https://www.github.com/qdzzyb2014/interview_python#9-迭代器和生成器
http://stackoverflow.com/questions/231767/what-does-the-yield-keyword-do-in-python	http://stackoverflow.com/questions/231767/what-does-the-yield-keyword-do-in-python
http://taizilongxu.gitbooks.io/stackoverflow-about-python/content/1/README.html	http://taizilongxu.gitbooks.io/stackoverflow-about-python/content/1/README.html
	https://www.github.com/qdzzyb2014/interview_python#10-args-and-kwargs
http://stackoverflow.com/questions/3394835/args-and-kwargs	http://stackoverflow.com/questions/3394835/args-and-kwargs
	https://www.github.com/qdzzyb2014/interview_python#11-面向切面编程aop和装饰器
http://stackoverflow.com/questions/739654/how-can-i-make-a-chain-of-function-decorators-in-python	http://stackoverflow.com/questions/739654/how-can-i-make-a-chain-of-function-decorators-in-python
http://taizilongxu.gitbooks.io/stackoverflow-about-python/content/3/README.html	http://taizilongxu.gitbooks.io/stackoverflow-about-python/content/3/README.html
	https://www.github.com/qdzzyb2014/interview_python#12-鸭子类型
	https://www.github.com/qdzzyb2014/interview_python#13-python中重载
http://www.zhihu.com/question/20053359	http://www.zhihu.com/question/20053359
	https://www.github.com/qdzzyb2014/interview_python#14-新式类和旧式类
stackoverflow	http://stackoverflow.com/questions/54867/what-is-the-difference-between-old-style-and-new-style-classes-in-python
http://www.cnblogs.com/btchenguang/archive/2012/09/17/2689146.html	http://www.cnblogs.com/btchenguang/archive/2012/09/17/2689146.html
	https://www.github.com/qdzzyb2014/interview_python#15-__new__和__init__的区别
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	https://www.github.com/qdzzyb2014/interview_python#16-单例模式
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http://www.cnblogs.com/my_life/articles/3968782.html	http://www.cnblogs.com/my_life/articles/3968782.html
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http://tech.meituan.com/mysql-index.html	http://tech.meituan.com/mysql-index.html
MySQL索引背后的数据结构及算法原理	http://blog.codinglabs.org/articles/theory-of-mysql-index.html
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	https://www.github.com/qdzzyb2014/interview_python#求两棵树是否相同
	https://www.github.com/qdzzyb2014/interview_python#前序中序求后序
http://blog.csdn.net/hinyunsin/article/details/6315502	http://blog.csdn.net/hinyunsin/article/details/6315502
	https://www.github.com/qdzzyb2014/interview_python#单链表逆置
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