<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_binary_from_ipv6(self, ip_addr):
 """Converts IPv6 address to binary form."""


        hi, lo = struct.unpack("!QQ", socket.inet_pton(socket.AF_INET6,
                                                       ip_addr))
        return (hi << 64) | lo