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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 btc_is_p2wpkh_address( address ):
 """ Is the given address a p2wpkh address? """

    wver, whash = segwit_addr_decode(address)
    if whash is None:
        return False

    if len(whash) != 20:
        return False

    return True