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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def provider(cls, note, provider=None, name=False):
 """Register a provider, either a Provider class or a generator. Provider class:: from jeni import Injector as BaseInjector from jeni import Provider class Injector(BaseInjector):
 pass @Injector.provider('hello') class HelloProvider(Provider):
 def get(self, name=None):
 if name is None: name = 'world' return 'Hello, {}!'.format(name) Simple generator:: @Injector.provider('answer') def answer():
 yield 42 If a generator supports get with a name argument:: @Injector.provider('spam', name=True) def spam():
 count_str = yield 'spam' while True: count_str = yield 'spam' * int(count_str) Registration can be a decorator or a direct method call:: Injector.provider('hello', HelloProvider) """

        def decorator(provider):
            if inspect.isgeneratorfunction(provider):
                # Automatically adapt generator functions
                provider = cls.generator_provider.bind(
                        provider, support_name=name)
                return decorator(provider)

            cls.register(note, provider)
            return provider

        if provider is not None:
            decorator(provider)
        else:
            return decorator