StopIteration
\end{verbatim}
-Because \keyword{yield} will often be returning \constant{None}, you
+\keyword{yield} will usually return \constant{None}, you
should always check for this case. Don't just use its value in
expressions unless you're sure that the \method{send()} method
-will be the only method used resume your generator function.
+will be the only method used to resume your generator function.
In addition to \method{send()}, there are two other new methods on
generators: