def print_header_content(nlh):
answer = '<STR_LIT>'.format(<EOL>nl_nlmsgtype2str(nlh.nlmsg_type, bytearray(), <NUM_LIT:32>).decode('<STR_LIT:ascii>'),<EOL>nlh.nlmsg_len,<EOL>nl_nlmsg_flags2str(nlh.nlmsg_flags, bytearray(), <NUM_LIT>).decode('<STR_LIT:ascii>'),<EOL>nlh.nlmsg_seq,<EOL>nlh.nlmsg_pid,<EOL>)<EOL>return answer<EOL>
Return header content (doesn't actually print like the C library does).

    https://github.com/thom311/libnl/blob/libnl3_2_25/lib/handlers.c#L34

    Positional arguments:
    nlh -- nlmsghdr class instance.