摘要：
Python 2.2之后内置类型开始可以子类化了但是，CPython中的内置类型不会调用用户重写的类的特殊方法。PyPy的文档中描述了这个问题。[subclasses-of-built-in-types](http://pypy.readthedocs.io/en/latest/cpython_differences.html#subclasses-of-built-in-types) 正式... 阅读全文
Aaron Swartz was and will always be a hero