How to make dynamic stub functions on the fly?

Question

I have a class with about 200 stub functions, they look something like this:

def name1(self, **kwargs):
    return self.run('name-1', kwargs)

def name2(self, ** kwargs):
    return self.run('name-2', kwargs)

So on and so forth.

There is a run function that takes care of the real work.

I want to reduce the 200 stub function to just 1 dynamic function that gets called when you make a call to the class with a method name that doesn't exist.

How do I do this?

Answer 1

您可以__getattr__在类中使用返回包装函数的方法run。您只需要一种在方法名称（例如name1）和应该传递给方法的字符串run（例如"name-1"）之间进行转换的方法。如果没有任何改变的话，这当然是最简单的。这是一个使用字典进行翻译的快速实现。如果您需要它适用于许多名称，您可能需要使用字符串操作和正则表达式来完成。

name_translation_dict = {"name1": "name-1", "name2": "name-2"}

def __getattr__(self, name):
    if name not in self.name_translation_dict:
        raise AttributeError()
    translated_name = self.name_translation_dict[name]
    def method(**kwargs):
        return self.run(translated_name, kwargs)
    return method