tree b4365351f6ef3028c7f7468a096508c33ee240d4
parent b015fc86f7b1f35283804bfee788cce0a5495df7
author Christopher Head <chead@chead.ca> 1555084241 -0700
committer Benjamin Peterson <benjamin@python.org> 1555084240 -0700

Indicate that seek and tell are mandatory on BufferedRandom. (GH-11216)

For BufferedReader and BufferedWriter, seek and tell operations are
optional (they may or may not exist based on the underlying stream). For
BufferedRandom, they are mandatory: a BufferedRandom should not be
constructed over an unseekable underlying stream. Document this.