Reference:
Http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python
http://blog.jobbole.com/21351/
In fact, it is the ancient and profound philosophical question: Is it the chicken egg, or the egg of Mr. Chicken? 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0057.gif "alt=" J_0057.gif "/>
Such a problem exists in everything.
The process of booting a system system, such as the operating system's boot program. Need some "hard soft combination" technology, give computer "consciousness".
The material structure that nature needs to design, as the consciousness of matter produces: life
The words of the I Ching can be summed up: No Yin not born, no Yang not long.
The meta class in Python is the object used to generate the class, and type is a built-in meta-class. So who generates the type? Generated by the compiler and type itself. Type is such a "hard and soft combination" thing. Is the "Taiji" Pyhton the programming language.
There is also this "Taiji" in JavaScript, which is the function object
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Python meta-class