Return a list of the sections in the bytes, using sep as the delimiter.
sep
The delimiter according which to split the bytes.
None (the default value) means split on ASCII whitespace
characters (space, tab, return, newline, formfeed, vertical tab).
maxsplit
Maximum number of splits to do.
-1 (the default value) means no limit.
Splitting is done starting at the end of the bytes and working to
the front.