\begin{Verbatim}[commandchars=\\\{\}]
\PYG{g+gp}{\PYGZgt{}\PYGZgt{}\PYGZgt{} }\PYG{k+kn}{from} \PYG{n+nn}{Bio.Align.substitution\PYGZus{}matrices} \PYG{k+kn}{import} \PYG{n}{Array}
\PYG{g+gp}{\PYGZgt{}\PYGZgt{}\PYGZgt{} }\PYG{n}{counts} \PYG{o}{=} \PYG{n}{Array}\PYG{p}{(}\PYG{l+s+s2}{\PYGZdq{}ACGT\PYGZdq{}}\PYG{p}{,} \PYG{n}{dims}\PYG{o}{=}\PYG{l+m+mi}{2}\PYG{p}{)}
\PYG{g+gp}{\PYGZgt{}\PYGZgt{}\PYGZgt{} }\PYG{n+nb}{print}\PYG{p}{(}\PYG{n}{counts}\PYG{p}{)}
\PYG{g+go}{    A   C   G   T}
\PYG{g+go}{A 0.0 0.0 0.0 0.0}
\PYG{g+go}{C 0.0 0.0 0.0 0.0}
\PYG{g+go}{G 0.0 0.0 0.0 0.0}
\PYG{g+go}{T 0.0 0.0 0.0 0.0}
\PYG{g+go}{\PYGZlt{}BLANKLINE\PYGZgt{}}
\end{Verbatim}
