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\documentclass[10pt,a4paper,english]{article}
\usepackage{babel}
\usepackage{ae}
\usepackage{aeguill}
\usepackage{shortvrb}
\usepackage[latin1]{inputenc}
\usepackage{tabularx}
\usepackage{longtable}
\setlength{\extrarowheight}{2pt}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{color}
\usepackage{multirow}
\usepackage{ifthen}
\usepackage[colorlinks=true,linkcolor=blue,urlcolor=blue]{hyperref}
\usepackage[DIV12]{typearea}
%% generator Docutils: http://docutils.sourceforge.net/
\newlength{\admonitionwidth}
\setlength{\admonitionwidth}{0.9\textwidth}
\newlength{\docinfowidth}
\setlength{\docinfowidth}{0.9\textwidth}
\newlength{\locallinewidth}
\newcommand{\optionlistlabel}[1]{\bf #1 \hfill}
\newenvironment{optionlist}[1]
{\begin{list}{}
{\setlength{\labelwidth}{#1}
\setlength{\rightmargin}{1cm}
\setlength{\leftmargin}{\rightmargin}
\addtolength{\leftmargin}{\labelwidth}
\addtolength{\leftmargin}{\labelsep}
\renewcommand{\makelabel}{\optionlistlabel}}
}{\end{list}}
\newlength{\lineblockindentation}
\setlength{\lineblockindentation}{2.5em}
\newenvironment{lineblock}[1]
{\begin{list}{}
{\setlength{\partopsep}{\parskip}
\addtolength{\partopsep}{\baselineskip}
\topsep0pt\itemsep0.15\baselineskip\parsep0pt
\leftmargin#1}
\raggedright}
{\end{list}}
% begin: floats for footnotes tweaking.
\setlength{\floatsep}{0.5em}
\setlength{\textfloatsep}{\fill}
\addtolength{\textfloatsep}{3em}
\renewcommand{\textfraction}{0.5}
\renewcommand{\topfraction}{0.5}
\renewcommand{\bottomfraction}{0.5}
\setcounter{totalnumber}{50}
\setcounter{topnumber}{50}
\setcounter{bottomnumber}{50}
% end floats for footnotes
% some commands, that could be overwritten in the style file.
\newcommand{\rubric}[1]{\subsection*{~\hfill {\it #1} \hfill ~}}
\newcommand{\titlereference}[1]{\textsl{#1}}
% end of "some commands"
\input{pygments-default.sty}
\title{Example for syntax highlight with Pygments}
\author{}
\date{}
\hypersetup{
pdftitle={Example for syntax highlight with Pygments}
}
\raggedbottom
\begin{document}
\maketitle
\setlength{\locallinewidth}{\linewidth}
% # -*- rst-mode -*-
Translate this document to HTML with a pygments enhanced frontend:
\begin{quote}{\ttfamily \raggedright \noindent
rst2html-pygments~-{}-stylesheet=pygments-default.css
}\end{quote}
or to LaTeX with:
\begin{quote}{\ttfamily \raggedright \noindent
rst2latex-pygments~-{}-stylesheet=pygments-default.sty
}\end{quote}
to gain syntax highlight in the output.
% Run the doctests with ``pylit --doctest for-else-test.py``.
%___________________________________________________________________________
\hypertarget{for-else-test}{}
\pdfbookmark[0]{for-else-test}{for-else-test}
\section*{for-else-test}
Test the flow in a \titlereference{for} loop with \titlereference{else} statement.
First define a simple \titlereference{for} loop.
\begin{Verbatim}[commandchars=@\[\]]
@Cax[def] @CaJ[loop1](iterable):
@Car["""simple for loop with `else` statement"""]
@Cax[for] i @Cam[in] iterable:
@Cax[print] i
@Cax[else]:
@Cax[print] @Cad["]@Cad[iterable empty]@Cad["]
@Cax[print] @Cad["]@Cad[Ende]@Cad["]
\end{Verbatim}
Now test it:
The first test runs as I expect: iterator empty -{\textgreater} else clause applies:
\begin{Verbatim}[commandchars=@\[\]]
@CaN[>>> ]loop1(@CaW[range](@Cag[0]))
@Caa[iterable empty]
@Caa[Ende]
\end{Verbatim}
However, the else clause even runs if the iterator is not empty in the first
place but after it is ``spent'':
\begin{Verbatim}[commandchars=@\[\]]
@CaN[>>> ]loop1(@CaW[range](@Cag[3]))
@Caa[0]
@Caa[1]
@Caa[2]
@Caa[iterable empty]
@Caa[Ende]
\end{Verbatim}
It seems like the else clause can only be prevented, if we break out of
the loop. Let's try
\begin{Verbatim}[commandchars=@\[\]]
@Cax[def] @CaJ[loop2](iterable):
@Car["""for loop with `break` and `else` statement"""]
@Cax[for] i @Cam[in] iterable:
@Cax[print] i
@Cax[break]
@Cax[else]:
@Cax[print] @Cad["]@Cad[iterable empty]@Cad["]
@Cax[print] @Cad["]@Cad[Ende]@Cad["]
\end{Verbatim}
And indeed, the else clause is skipped after breaking out of the loop:
\begin{Verbatim}[commandchars=@\[\]]
@CaN[>>> ]loop2(@CaW[range](@Cag[3]))
@Caa[0]
@Caa[Ende]
\end{Verbatim}
The empty iterator runs as expected:
\begin{Verbatim}[commandchars=@\[\]]
@CaN[>>> ]loop2(@CaW[range](@Cag[0]))
@Caa[iterable empty]
@Caa[Ende]
\end{Verbatim}
\begin{center}\small
Generated on: 2007-04-24.
\end{center}
\end{document}
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