Create and return an mwrank interpreter, with given options.
INPUT:
Bases: sage.interfaces.expect.Expect
Interface to the Mwrank interpreter.
Send a line of input to mwrank, then when it finishes return everything that mwrank output.
NOTE: If a RuntimeError exception is raised, then the mwrank interface is restarted and the command is retried once.
Quit the mwrank process using kill -9 (so exit doesn’t dump core, etc.).