\begin{Verbatim}[commandchars=\\\{\}]
\PYG{g+gp}{\PYGZgt{}\PYGZgt{}\PYGZgt{} }\PYG{n}{observed\PYGZus{}frequencies} \PYG{o}{=} \PYG{n}{observed\PYGZus{}frequencies}\PYG{o}{.}\PYG{n}{select}\PYG{p}{(}\PYG{l+s+s2}{\PYGZdq{}DEHKR\PYGZdq{}}\PYG{p}{)}
\PYG{g+gp}{\PYGZgt{}\PYGZgt{}\PYGZgt{} }\PYG{n+nb}{print}\PYG{p}{(}\PYG{n}{observed\PYGZus{}frequencies}\PYG{p}{)}
\PYG{g+go}{       D      E      H      K      R}
\PYG{g+go}{D 2360.0  255.5    7.5    0.5   25.0}
\PYG{g+go}{E  255.5 3305.0   16.5   27.0    2.0}
\PYG{g+go}{H    7.5   16.5 1235.0   16.0    8.5}
\PYG{g+go}{K    0.5   27.0   16.0 3218.0  116.5}
\PYG{g+go}{R   25.0    2.0    8.5  116.5 2079.0}
\PYG{g+go}{\PYGZlt{}BLANKLINE\PYGZgt{}}
\end{Verbatim}
