human
Complete the below
@base.sql_function
def ip_address_delete(session, ifname, ifaddr):

    ''''Deletes an IP address from interface record identified with the given
    "ifname".
    The arguments are similar to "ip address delete" command of iproute2.
    :param session: Session instance connecting to database.
    :param ifname: Name of interface.
    :param ifaddr: IPv4 or IPv6 address.
    :return: Instance of record or "None" if failed.'
    '''
 Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    def _remove_inet_addr(intf_inet, addr):
        addr_list = intf_inet.split(',')
        if (addr not in addr_list):
            LOG.debug('Interface    "%s"    does    not    have    "ifaddr":    %s', intf.ifname, addr)
            return intf_inet
        else:
            addr_list.remove(addr)
            return ','.join(addr_list)
    intf = ip_link_show(session, ifname=ifname)
    if (not intf):
        LOG.debug('Interface    "%s"    does    not    exist', ifname)
        return None
    if ip.valid_ipv4(ifaddr):
        intf.inet = _remove_inet_addr(intf.inet, ifaddr)
    elif ip.valid_ipv6(ifaddr):
        intf.inet6 = _remove_inet_addr(intf.inet6, ifaddr)
    else:
        LOG.debug('Invalid    IP    address    for    "ifaddr":    %s', ifaddr)
        return None
    return intf