\begin{Verbatim}[commandchars=@\[\]]
@PYbc[from] @PYaV[os] @PYbc[import] listdir
@PYbc[from] @PYaV[itertools] @PYbc[import] imap

@PYay[print] @PYaX[sum](@PYaX[int](i) @PYay[for] i @PYav[in] @PYaB["]@PYaB[123456]@PYaB["])
@PYay[print] @PYaX[sum](imap(@PYaX[int], @PYaB["]@PYaB[123456]@PYaB["]))
@PYay[print] @PYaX[sum](@PYaw[1] @PYay[for] e @PYav[in] listdir(@PYaB[']@PYaB[.]@PYaB[']) @PYay[if] e@PYbe[.]endswith(@PYaB[']@PYaB[.py]@PYaB[']))
@PYay[print] @PYaX[sum](@PYZlb[]@PYZlb[]@PYaB["]@PYaB[Python]@PYaB["], @PYaB["]@PYaB[Smalltalk]@PYaB["]@PYZrb[],
    @PYZlb[]@PYaB["]@PYaB[Scheme]@PYaB["], @PYaB["]@PYaB[Haskell]@PYaB["]@PYZrb[]@PYZrb[], @PYZlb[]@PYZrb[])
\end{Verbatim}