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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 encode_if_py2(func):
 """If Python 2.x, return decorated function encoding unicode return value to UTF-8; else noop. """

    if not PY2:
        return func
    def wrapped(*args, **kwargs):
        ret = func(*args, **kwargs)
        if not isinstance(ret, unicode):
            raise TypeError('Wrapped function must return `unicode`')
        return ret.encode('utf-8', 'ignore')
    return wrapped