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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(val):
 """ Encode a string assuming the encoding is UTF-8. :param: a unicode or bytes object :returns: bytes """

    if isinstance(val, (list, tuple)):  # encode a list or tuple of strings
        return [encode(v) for v in val]
    elif isinstance(val, str):
        return val.encode('utf-8')
    else:
        # assume it was an already encoded object
        return val