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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 renamed_class(cls):
 """Helper class for renaming Agent => Trainer with a warning."""


    class DeprecationWrapper(cls):
        def __init__(self, config=None, env=None, logger_creator=None):
            old_name = cls.__name__.replace("Trainer", "Agent")
            new_name = cls.__name__
            logger.warn("DeprecationWarning: {} has been renamed to {}. ".
                        format(old_name, new_name) +
                        "This will raise an error in the future.")
            cls.__init__(self, config, env, logger_creator)

    DeprecationWrapper.__name__ = cls.__name__

    return DeprecationWrapper