Shulou(Shulou.com)06/03 Report--

This article mainly introduces how to use the python magic function in the class, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

1. The magic function is written in the class, and the init function has at least one parameter self.

2. Pass parameters to the attribute to be modified through parameters, and the general parameter name is the same as the attribute name.

3. Once the _ _ init__ function is written, the _ _ init__ function has other parameters in addition to self.

In addition to self, the argument to the _ _ init__ function is required to pass a value. You can also set default values for the parameters of the _ _ init__ function.

Example

Class Rectangle: length = 0 width = 0 def _ init__ (self, length, width): self.length = length self.width = width def area (rect): return rect.length * rect.width def perimeter (rect): return 2 * (rect.length+rect.width) rect = Rectangle (3Power4) # when the object is created, the _ _ init__ function is called automatically 3 and 4 will be created for length and width.print (rect.length,rect.width) print (rect.area ()) to thank you for reading this article carefully. I hope the article "how to use python magic functions in classes" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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