How to use the blockcypher.create_unsigned_tx function in blockcypher

def test_create_ps2h_unsigned(self):
        # This address I previously sent funds to but threw out the private key
        create_unsigned_tx(
                inputs=[
                    {
                        'pubkeys': [
                            '036f5ca449944655b5c580ff6686bdd19123d1003b41f49f4b603f53e33f70a2d1',
                            '03e93a754aa03dedbe032e5be051bce031db4337c48fbbcf970d1b27bb25a07964',
                            '02582061ab1dba9d6b5b4e6e29f9da2bd590862f1b1e8566f405eb1d92898eafee',
                            ],
                        'script_type': 'multisig-2-of-3'
                        },
                    ],
                outputs=[
                    {
                        'value': -1,
                        'address': 'CFr99841LyMkyX5ZTGepY58rjXJhyNGXHf',
                        },
                    ],

def test_create_basic_unsigned(self):
        # This address I previously sent funds to but threw out the private key
        create_unsigned_tx(
                inputs=[
                    {'address': 'BwvSPyMWVL1gkp5FZdrGXLpHj2ZJyJYLVB'},
                    ],
                outputs=[
                    {
                        'value': -1,
                        # p2sh address for extra measure
                        'address': 'Dbc9fnf1Kqct7zvfNTiwr6HjvDfPYaFSNg',
                        },
                    ],
                change_address=None,
                include_tosigntx=True,
                # will test signature returned locally:
                verify_tosigntx=True,
                coin_symbol='bcy',
                api_key=BC_API_KEY,

def test_create_nulldata_unsigned(self):
        # This address I previously sent funds to but threw out the private key
        create_unsigned_tx(
                inputs=[
                    {'address': 'BwvSPyMWVL1gkp5FZdrGXLpHj2ZJyJYLVB'},
                    ],
                outputs=[
                    # embed some null-data
                    {
                        'value': 0,
                        'script_type': 'null-data',
                        'script': '6a06010203040506',
                        },
                    ],
                change_address='CFr99841LyMkyX5ZTGepY58rjXJhyNGXHf',
                include_tosigntx=True,
                # will test signature returned locally:
                verify_tosigntx=True,
                coin_symbol='bcy',

def send_multi_payment(payment_privkey, list_of_addresses, payment_per_address):

    payment_address = get_address_from_privkey(payment_privkey)

    if dontuseAddress(payment_address):
        log.debug("Payment address %s not ready" % payment_address)
        return None

    inputs = [{'address': payment_address}]
    payment_in_satoshis = btc_to_satoshis(float(payment_per_address))
    outputs = []

    for address in list_of_addresses:
        outputs.append({'address': address, 'value': int(payment_in_satoshis)})

    unsigned_tx = create_unsigned_tx(inputs=inputs, outputs=outputs,
                                     api_key=BLOCKCYPHER_TOKEN)

    # iterate through unsigned_tx['tx']['inputs'] to find each address in order
    # need to include duplicates as many times as they may appear
    privkey_list = []
    pubkey_list = []

    for input in unsigned_tx['tx']['inputs']:
        privkey_list.append(payment_privkey)
        pubkey_list.append(get_pubkey_from_privkey(payment_privkey))

    tx_signatures = make_tx_signatures(txs_to_sign=unsigned_tx['tosign'],
                                       privkey_list=privkey_list,
                                       pubkey_list=pubkey_list)

    resp = broadcast_signed_transaction(unsigned_tx=unsigned_tx,

def send_multi_payment(payment_privkey, list_of_addresses, payment_per_address):

    payment_address = get_address_from_privkey(payment_privkey)

    if dontuseAddress(payment_address):
        log.debug("Payment address %s not ready" % payment_address)
        return None

    inputs = [{'address': payment_address}]
    payment_in_satoshis = btc_to_satoshis(float(payment_per_address))
    outputs = []

    for address in list_of_addresses:
        outputs.append({'address': address, 'value': int(payment_in_satoshis)})

    unsigned_tx = create_unsigned_tx(inputs=inputs, outputs=outputs,
                                     api_key=BLOCKCYPHER_TOKEN)

    # iterate through unsigned_tx['tx']['inputs'] to find each address in order
    # need to include duplicates as many times as they may appear
    privkey_list = []
    pubkey_list = []

    for input in unsigned_tx['tx']['inputs']:
        privkey_list.append(payment_privkey)
        pubkey_list.append(get_pubkey_from_privkey(payment_privkey))

    tx_signatures = make_tx_signatures(txs_to_sign=unsigned_tx['tosign'],
                                       privkey_list=privkey_list,
                                       pubkey_list=pubkey_list)

    resp = broadcast_signed_transaction(unsigned_tx=unsigned_tx,