Hello,

in the current version (3.6.2rc1) of the documentation of the socket module, the description of socket.setsockopt says:

socket.setsockopt(level, optname, value: int)

socket.setsockopt(level, optname, value: buffer)

socket.setsockopt(level, optname, None, optlen: int)

Set the value of the given socket option (see the Unix manual page setsockopt(2)). The needed symbolic constants are defined in the socket module (SO_* etc.). The value can be an integer, None or a bytes-like object representing a buffer. In the later case it is up to the caller to ensure that the bytestring contains the proper bits (see the optional built-in module struct for a way to encode C structures as bytestrings). When value is set to None, optlen argument is required. It’s equivalent to call setsockopt C function with optval=NULL and optlen=optlen.

Changed in version 3.5: Writable bytes-like object is now accepted.

Changed in version 3.6: setsockopt(level, optname, None, optlen: int) form added.

In my opinion, the fourth sentence should start with 'In the latter case..' not with 'In the later case'.

With kind regards

Julian