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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 hook(self, function, dependencies=None):
 """Tries to load a hook Args: function (func):
 Function that will be called when the event is called Kwargs: dependencies (str):
 String or Iterable with modules whose hooks should be called before this one Raises: :class:TypeError Note that the dependencies are module-wide, that means that if `parent.foo` and `parent.bar` are both subscribed to `example` event and `child` enumerates `parent` as dependcy, **both** `foo` and `bar` must be called in order for the dependcy to get resolved. """

        if not isinstance(dependencies, (Iterable, type(None), str)):
            raise TypeError("Invalid list of dependencies provided!")

        # Tag the function with its dependencies
        if not hasattr(function, "__deps__"):
            function.__deps__ = dependencies

        # If a module is loaded before all its dependencies are loaded, put
        # it in _later list and don't load yet
        if self.isloaded(function.__deps__):
            self.append(function)
        else:
            self._later.append(function)

        # After each module load, retry to resolve dependencies
        for ext in self._later:
            if self.isloaded(ext.__deps__):
                self._later.remove(ext)
                self.hook(ext)