169 \begin{frame}[fragile]

   169 %% \begin{frame}[fragile]

   170     \frametitle{\incqno}

   170 %%     \frametitle{\incqno}

   171   \begin{lstlisting}

   171 %%   \begin{lstlisting}

   172 def func(x, y=10):

   172 %% def func(x, y=10):

   173     print x+1, y+10

   173 %%     print x+1, y+10

   175 func(1)

   175 %% func(1)

   177   \end{lstlisting}

   177 %%   \end{lstlisting}

   178   What is the output?

   178 %%   What is the output?

   179 \end{frame}

   179 %% \end{frame}

   181 \begin{frame}

   181 %% \begin{frame}

   182     \frametitle{\incqno}

   182 %%     \frametitle{\incqno}

   183   How many items can a function return?

   183 %%   How many items can a function return?

   184 \end{frame}

   184 %% \end{frame}