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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 spawn(self, **kwargs):
        '''Return a new worker for a child process'''
        copy = dict(self.kwargs)
        copy.update(kwargs)
        # Apparently there's an issue with importing gevent in the parent
        # process and then using it int he child. This is meant to relieve that
        # problem by allowing `klass` to be specified as a string.
        if isinstance(self.klass, string_types):
            self.klass = util.import_class(self.klass)
        return self.klass(self.queues, self.client, **copy)