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This article mainly introduces the python namespace how to find the correct function, 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.

The get function determines which function will be called (if overloaded).

1. The process of finding the correct function is very simple, starting with the key method, which uses functions and parameters to create unique keys.

Just like you did when you registered.

2. Find out whether the key exists in the function registry, and if so, get the implementation of its mapping.

Example

Def get (self, fn, * args): "returns the matching function from the virtual namespace, or None" func = Function (fn) return self.function_map.get (func.key (args=args)) if no match is found.

The get function creates an example of the Function class so that you can reuse the class's key function to obtain a unique key without having to write the logic to create the key. This key will be used to get the correct function from the function registry.

In order to distinguish different functions, in addition to the usual module, class, and function names, it can also be distinguished according to the number of parameters of the function. Therefore, we define a method in the virtual namespace that reads the functions and actual parameters to be distinguished from the Python namespace, and finally returns the correct function according to the different parameters. We have not changed the default behavior of Python, so there is only one function with the same name in the original namespace.

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