code: def nla_find(head, len_, attrtype):
      
      rem = c_int()
      for nla in nla_for_each_attr(head, len_, rem):
          if nla_type(nla) == attrtype:
              return nla
      return None
docs: Find a single attribute in a stream of attributes.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/lib/attr.c#L323
  
      Iterates over the stream of attributes and compares each type with the type specified. Returns the first attribute
      which matches the type.
  
      Positional arguments:
      head -- first nlattr with more in its bytearray payload (nlattr class instance).
      len_ -- length of attributes stream (integer).
      attrtype -- attribute type to look for (integer).
  
      Returns:
      Attribute found (nlattr class instance) or None.