How to use the nassl.SSLV3 function in nassl

def process_task(self, target, command, args):

        MAX_THREADS = 15
        sslVersionDict = {'sslv2': SSLV2,
                       'sslv3': SSLV3,
                       'tlsv1': TLSV1,
                       'tlsv1_1': TLSV1_1,
                       'tlsv1_2': TLSV1_2}
        try:
            sslVersion = sslVersionDict[command]
        except KeyError:
            raise Exception("PluginOpenSSLCipherSuites: Unknown command.")

        # Get the list of available cipher suites for the given ssl version
        sslClient = SslClient(sslVersion=sslVersion)
        sslClient.set_cipher_list('ALL:COMPLEMENTOFALL')
        cipher_list = sslClient.get_cipher_list()

        # Create a thread pool
        NB_THREADS = min(len(cipher_list), MAX_THREADS) # One thread per cipher
        thread_pool = ThreadPool()

def process_task(self, target, command, args):

        MAX_THREADS = 30
        sslVersionDict = {'sslv2': SSLV2,
                       'sslv3': SSLV3,
                       'tlsv1': TLSV1,
                       'tlsv1_1': TLSV1_1,
                       'tlsv1_2': TLSV1_2}
        try:
            sslVersion = sslVersionDict[command]
        except KeyError:
            raise Exception("PluginOpenSSLCipherSuites: Unknown command.")

        # Get the list of available cipher suites for the given ssl version
        sslClient = SslClient(sslVersion=sslVersion)
        sslClient.set_cipher_list('ALL:COMPLEMENTOFALL')
        cipher_list = sslClient.get_cipher_list()

        # Create a thread pool
        NB_THREADS = min(len(cipher_list), MAX_THREADS) # One thread per cipher
        thread_pool = ThreadPool()

def heartbleed_payload(sslVersion):
    # This heartbleed payload does not exploit the server
    # https://blog.mozilla.org/security/2014/04/12/testing-for-heartbleed-vulnerability-without-exploiting-the-server/

    SSL_VERSION_MAPPING = {
        SSLV3 :  '\x00', # Surprising that it works with SSL 3 which doesn't define TLS extensions
        TLSV1 :  '\x01',
        TLSV1_1: '\x02',
        TLSV1_2: '\x03'}

    payload = (
        '\x18'           # Record type - Heartbeat
        '\x03{0}'               # TLS version
        '\x40\x00'              # Record length
        '\x01'                  # Heartbeat type - Request
        '\x3f\xfd')             # Heartbeat length

    payload += '\x01'*16381     # Heartbeat data

    payload += (                # Second Heartbeat request with no padding
        '\x18'                  # Record type - Heartbeat
        '\x03{0}'