How to use the pywaves.validateAddress function in PyWaves

def __init__(self, address='', publicKey='', privateKey='', seed='', alias='', nonce=0):
        if nonce<0 or nonce>4294967295:
            raise ValueError('Nonce must be between 0 and 4294967295')
        if seed:
            self._generate(seed=seed, nonce=nonce)
        elif publicKey:
            self._generate(publicKey=publicKey)
        elif address:
            if not pywaves.validateAddress(address):
                raise ValueError("Invalid address")
            else:
                self.address = address
                self.publicKey = publicKey
                self.privateKey = privateKey
                self.seed = seed
                self.nonce = nonce
        elif alias and not pywaves.OFFLINE:
            self.address = pywaves.wrapper('/alias/by-alias/%s' % alias).get("address", "")
            self.publicKey = ''
            self.privateKey = ''
            self.seed = ''
            self.nonce = 0
        elif privateKey == '' or privateKey:
            if len(privateKey) == 0:
                raise ValueError('Empty private key not allowed')