<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def nlmsg_alloc_simple(nlmsgtype, flags):
 """Allocate a new Netlink message. https://github.com/thom311/libnl/blob/libnl3_2_25/lib/msg.c#L346 Positional arguments: nlmsgtype -- Netlink message type (integer). flags -- message flags (integer). Returns: Newly allocated Netlink message (nl_msg class instance) or None. """

    nlh = libnl.linux_private.netlink.nlmsghdr(nlmsg_type=nlmsgtype, nlmsg_flags=flags)
    msg = nlmsg_inherit(nlh)
    _LOGGER.debug('msg 0x%x: Allocated new simple message', id(msg))
    return msg