正文
Pythonn new-style class and old-style class
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
In [1]: class old():
...: a = 1
...:
In [2]: o = old()
In [3]: o.__class__
Out[3]: <class __main__.old at 0x7fb1fd1c56d0>
In [4]: type(o)
Out[4]: instance
In [5]: class new(object):
...: a = 2
...:
In [6]: n = new()
In [7]: n.__class__
Out[7]: __main__.new
In [8]: type(n)
Out[8]: __main__.new
1）在多继承中，新式类采用广度优先搜索，而旧式类是采用深度优先搜索。
2）新式类更符合OOP编程思想，统一了python中的类型机制。
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