Merge pull request #12 from fperez/latex-conv

Latex converter, lots of fixes and some refactoring

preamble.tex

@@ -0,0 +1,94 b''
+%% This is the automatic preamble used by IPython.  Note that it does *not*
+%% include a documentclass declaration, that is added at runtime to the overall
+%% document.
+
+\usepackage{amsmath}
+\usepackage{amssymb}
+\usepackage{graphicx}
+
+% needed for markdown enumerations to work
+\usepackage{enumerate}
+
+% Slightly bigger margins than the latex defaults
+\usepackage{geometry}
+\geometry{verbose,tmargin=3cm,bmargin=3cm,lmargin=2.5cm,rmargin=2.5cm}
+
+% Define a few colors for use in code, links and cell shading
+\usepackage{color}
+\definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
+\definecolor{darkorange}{rgb}{.71,0.21,0.01}
+\definecolor{darkgreen}{rgb}{.12,.54,.11}
+\definecolor{myteal}{rgb}{.26, .44, .56}
+\definecolor{gray}{gray}{0.45}
+\definecolor{lightgray}{gray}{.95}
+\definecolor{mediumgray}{gray}{.8}
+\definecolor{inputbackground}{rgb}{.95, .95, .85}
+\definecolor{outputbackground}{rgb}{.95, .95, .95}
+\definecolor{traceback}{rgb}{1, .95, .95}
+
+% Framed environments for code cells (inputs, outputs, errors, ...).  The
+% various uses of \unskip (or not) at the end were fine-tuned by hand, so don't
+% randomly change them unless you're sure of the effect it will have.
+\usepackage{framed}
+
+% remove extraneous vertical space in boxes
+\setlength\fboxsep{0pt}
+
+% codecell is the whole input+output set of blocks that a Code cell can
+% generate.
+\newenvironment{codecell}{%
+    \def\FrameCommand{\color{mediumgray} \vrule width 1pt \hspace{5pt}}%
+   \MakeFramed{\vspace{-0.5em}\FrameRestore}}
+ {\unskip\endMakeFramed}
+
+ \newenvironment{codeinput}{%
+   \def\FrameCommand{\colorbox{inputbackground}}%
+   \MakeFramed{\advance\hsize-\width \FrameRestore}}
+ {\unskip\endMakeFramed}
+
+\newenvironment{codeoutput}{%
+   \def\FrameCommand{\colorbox{outputbackground}}%
+   \vspace{-1.4em}
+   \MakeFramed{\advance\hsize-\width \FrameRestore}}
+ {\unskip\medskip\endMakeFramed}
+
+\newenvironment{traceback}{%
+   \def\FrameCommand{\colorbox{traceback}}%
+   \MakeFramed{\advance\hsize-\width \FrameRestore}}
+ {\endMakeFramed}
+
+% Use and configure listings package for nicely formatted code
+\usepackage{listings}
+\lstset{
+  language=python,
+  aboveskip=\smallskipamount,
+  belowskip=\smallskipamount,
+  %xleftmargin=3mm,
+  breaklines=true,
+  basicstyle=\small \ttfamily,
+  showstringspaces=false,
+  keywordstyle=\color{blue}\bfseries,
+  commentstyle=\color{myteal},
+  stringstyle=\color{darkgreen},
+  identifierstyle=\color{darkorange},
+}
+
+% The hyperref package gives us a pdf with properly built
+% internal navigation ('pdf bookmarks' for the table of contents,
+% internal cross-reference links, web links for URLs, etc.)
+\usepackage{hyperref}
+\hypersetup{
+  breaklinks=true,  % so long urls are correctly broken across lines
+  colorlinks=true,
+  urlcolor=blue,
+  linkcolor=darkorange,
+  citecolor=darkgreen,
+  }
+
+% hardcode size of all verbatim environments to be a bit smaller
+\makeatletter 
+\g@addto@macro\@verbatim\small\topsep=0.5em\partopsep=0pt
+\makeatother 
+
+% Prevent overflowing lines due to urls and other hard-to-break entities.
+\sloppy

nbconvert.py

@@ -9,23 +9,82 b' called nb_figure_NN.png. To avoid the two-step process, ipynb -> rst -> html,'
 use '--format quick-html' which will do ipynb -> html, but won't look as
 pretty.
 """
-
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+from __future__ import print_function
+
+# Stdlib
+import codecs
+import logging
 import os
+import pprint
+import re
 import subprocess
 import sys
+
+inkscape = 'inkscape'
+if sys.platform == 'darwin':
+    inkscape = '/Applications/Inkscape.app/Contents/Resources/bin/inkscape'
+    if not os.path.exists(inkscape):
+        inkscape = None
+
+# From IPython
 from IPython.external import argparse
 from IPython.nbformat import current as nbformat
 from IPython.utils.text import indent
 from decorators import DocInherit
 
-# Cell converters
+#-----------------------------------------------------------------------------
+# Utility functions
+#-----------------------------------------------------------------------------
+
+def remove_fake_files_url(cell):
+    """Remove from the cell source the /files/ pseudo-path we use.
+    """
+    src = cell.source
+    cell.source = src.replace('/files/', '')
+
+
+def remove_ansi(src):
+    """Strip all ANSI color escape sequences from input string.
+
+    Parameters
+    ----------
+    src : string
 
-def unknown_cell(cell):
-    """Default converter for cells of unknown type.
+    Returns
+    -------
+    string
     """
+    return re.sub(r'\033\[(0|\d;\d\d)m', '', src)
 
-    return rst_directive('.. warning:: Unknown cell') + \
-      [repr(cell)]
+
+# Pandoc-dependent code
+def markdown2latex(src):
+    """Convert a markdown string to LaTeX via pandoc.
+
+    This function will raise an error if pandoc is not installed.
+
+    Any error messages generated by pandoc are printed to stderr.
+
+    Parameters
+    ----------
+    src : string
+      Input string, assumed to be valid markdown.
+
+    Returns
+    -------
+    out : string
+      Output as returned by pandoc.
+    """
+    p = subprocess.Popen('pandoc -f markdown -t latex'.split(),
+                         stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+    out, err = p.communicate(src)
+    if err:
+        print(err, file=sys.stderr)
+    #print('*'*20+'\n', out, '\n'+'*'*20)  # dbg
+    return out
 
 
 def rst_directive(directive, text=''):
@@ -34,8 +93,9 b" def rst_directive(directive, text=''):"
         out.extend([indent(text), ''])
     return out
 
-# Converters for parts of a cell.
-
+#-----------------------------------------------------------------------------
+# Class declarations
+#-----------------------------------------------------------------------------
 
 class ConversionException(Exception):
     pass
@@ -43,29 +103,43 b' class ConversionException(Exception):'
 
 class Converter(object):
     default_encoding = 'utf-8'
-
+    extension = str()
+    figures_counter = 0
+    infile = str()
+    infile_dir = str()
+    infile_root = str()
+    files_dir = str()
+    with_preamble = True
+    user_preamble = None
+    output = str()
+    raw_as_verbatim = False
+        
     def __init__(self, infile):
         self.infile = infile
-        self.dirpath = os.path.dirname(infile)
-
-    @property
-    def extension(self):
-        raise ConversionException("""extension must be defined in Converter
-                subclass""")
+        self.infile_dir = os.path.dirname(infile)
+        infile_root = os.path.splitext(infile)[0]
+        files_dir = infile_root + '_files'
+        if not os.path.isdir(files_dir):
+            os.mkdir(files_dir)
+        self.infile_root = infile_root
+        self.files_dir = files_dir
 
     def dispatch(self, cell_type):
         """return cell_type dependent render method,  for example render_code
         """
-        # XXX: unknown_cell here is RST specific - make it generic
-        return getattr(self, 'render_' + cell_type, unknown_cell)
+        return getattr(self, 'render_' + cell_type, self.render_unknown)
 
     def convert(self):
         lines = []
         lines.extend(self.optional_header())
-        for cell in self.nb.worksheets[0].cells:
-            conv_fn = self.dispatch(cell.cell_type)
-            lines.extend(conv_fn(cell))
-            lines.append('')
+        for worksheet in self.nb.worksheets:
+            for cell in worksheet.cells:
+                #print(cell.cell_type)  # dbg
+                conv_fn = self.dispatch(cell.cell_type)
+                if cell.cell_type in ('markdown', 'raw'):
+                    remove_fake_files_url(cell)
+                lines.extend(conv_fn(cell))
+                lines.append('')
         lines.extend(self.optional_footer())
         return '\n'.join(lines)
 
@@ -83,12 +157,13 b' class Converter(object):'
     def save(self, infile=None, encoding=None):
         "read and parse notebook into self.nb"
         if infile is None:
-            infile = os.path.splitext(self.infile)[0] + '.' + self.extension
+            outfile = os.path.basename(self.infile)
+            outfile = os.path.splitext(outfile)[0] + '.' + self.extension
         if encoding is None:
             encoding = self.default_encoding
-        with open(infile, 'w') as f:
+        with open(outfile, 'w') as f:
             f.write(self.output.encode(encoding))
-        return infile
+        return os.path.abspath(outfile)
 
     def optional_header(self):
         return []
@@ -96,6 +171,28 b' class Converter(object):'
     def optional_footer(self):
         return []
 
+    def _new_figure(self, data, fmt):
+        """Create a new figure file in the given format.
+
+        Returns a path relative to the input file.
+        """
+        figname = '%s_fig_%02i.%s' % (self.infile_root, 
+                                      self.figures_counter, fmt)
+        self.figures_counter += 1
+        fullname = os.path.join(self.files_dir, figname)
+
+        # Binary files are base64-encoded, SVG is already XML
+        if fmt in ('png', 'jpg', 'pdf'):
+            data = data.decode('base64')
+            fopen = lambda fname: open(fname, 'wb')
+        else:
+            fopen = lambda fname: codecs.open(fname, 'wb', self.default_encoding)
+            
+        with fopen(fullname) as f:
+            f.write(data)
+            
+        return fullname
+
     def render_heading(self, cell):
         """convert a heading cell
 
@@ -114,18 +211,43 b' class Converter(object):'
         Returns list."""
         raise NotImplementedError
 
-    def render_pyout(self, cell):
+    def render_pyout(self, output):
         """convert pyout part of a code cell
 
         Returns list."""
         raise NotImplementedError
 
-    def render_display_data(self, cell):
+
+    def render_pyerr(self, output):
+        """convert pyerr part of a code cell
+
+        Returns list."""
+        raise NotImplementedError
+
+    def _img_lines(self, img_file):
+        """Return list of lines to include an image file."""
+        # Note: subclasses may choose to implement format-specific _FMT_lines
+        # methods if they so choose (FMT in {png, svg, jpg, pdf}).
+        raise NotImplementedError
+
+    def render_display_data(self, output):
         """convert display data from the output of a code cell
 
         Returns list.
         """
-        raise NotImplementedError
+        lines = []
+
+        for fmt in ['png', 'svg', 'jpg', 'pdf']:
+            if fmt in output:
+                img_file = self._new_figure(output[fmt], fmt)
+                # Subclasses can have format-specific render functions (e.g.,
+                # latex has to auto-convert all SVG to PDF first).
+                lines_fun = getattr(self, '_%s_lines' % fmt, None)
+                if not lines_fun:
+                    lines_fun = self._img_lines
+                lines.extend(lines_fun(img_file))
+
+        return lines
 
     def render_stream(self, cell):
         """convert stream part of a code cell
@@ -133,16 +255,33 b' class Converter(object):'
         Returns list."""
         raise NotImplementedError
 
-    def render_plaintext(self, cell):
-        """convert plain text
+    def render_raw(self, cell):
+        """convert a cell with raw text
 
         Returns list."""
         raise NotImplementedError
 
+    def render_unknown(self, cell):
+        """Render cells of unkown type
+
+        Returns list."""
+        data = pprint.pformat(cell)
+        logging.warning('Unknown cell:\n%s' % data)
+        return self._unknown_lines(data)
+
+    def _unknown_lines(self, data):
+        """Return list of lines for an unknown cell.
+
+        Parameters
+        ----------
+        data : str
+          The content of the unknown data as a single string.
+        """
+        raise NotImplementedError
+
 
 class ConverterRST(Converter):
     extension = 'rst'
-    figures_counter = 0
     heading_level = {1: '=', 2: '-', 3: '`', 4: '\'', 5: '.', 6: '~'}
 
     @DocInherit
@@ -169,8 +308,11 b' class ConverterRST(Converter):'
         return [cell.source]
 
     @DocInherit
-    def render_plaintext(self, cell):
-        return [cell.source]
+    def render_raw(self, cell):
+        if self.raw_as_verbatim:
+            return ['::', '', indent(cell.source), '']
+        else:
+            return [cell.source]
 
     @DocInherit
     def render_pyout(self, output):
@@ -186,25 +328,15 b' class ConverterRST(Converter):'
         return lines
 
     @DocInherit
-    def render_display_data(self, output):
-        lines = []
-
-        if 'png' in output:
-            # XXX: make the figures notebooks specific (i.e. self.infile) so
-            # that multiple notebook conversions don't clobber each other's
-            # figures
-            infile = 'nb_figure_%s.png' % self.figures_counter
-            fullname = os.path.join(self.dirpath, infile)
-            with open(fullname, 'w') as f:
-                f.write(output.png.decode('base64'))
-
-            self.figures_counter += 1
-            lines.append('.. image:: %s' % infile)
-            lines.append('')
-
-        return lines
+    def render_pyerr(self, output):
+        # Note: a traceback is a *list* of frames.
+        return ['::', '', indent(remove_ansi('\n'.join(output.traceback))), '']
 
     @DocInherit
+    def _img_lines(self, img_file):
+        return ['.. image:: %s' % img_file, '']
+    
+    @DocInherit
     def render_stream(self, output):
         lines = []
 
@@ -213,9 +345,17 b' class ConverterRST(Converter):'
 
         return lines
 
+    @DocInherit
+    def _unknown_lines(self, data):
+        return rst_directive('.. warning:: Unknown cell') + [data]
+
+
 class ConverterQuickHTML(Converter):
     extension = 'html'
-    figures_counter = 0
+
+    def in_tag(self, tag, src):
+        """Return a list of elements bracketed by the given tag"""
+        return ['<%s>' % tag, src, '</%s>' % tag]
 
     def optional_header(self):
         # XXX: inject the IPython standard CSS into here
@@ -259,54 +399,226 b' class ConverterQuickHTML(Converter):'
 
     @DocInherit
     def render_markdown(self, cell):
-        return ["<pre>"+cell.source+"</pre>"]
+        return self.in_tag('pre', cell.source)
 
     @DocInherit
-    def render_plaintext(self, cell):
-        return ["<pre>"+cell.source+"</pre>"]
+    def render_raw(self, cell):
+        if self.raw_as_verbatim:
+            return self.in_tag('pre', cell.source)
+        else:
+            return [cell.source]
 
     @DocInherit
     def render_pyout(self, output):
-        lines = ['<tr><td><tt>Out[<b>%s</b>]:</tt></td></tr>' % output.prompt_number, '<td>']
+        lines = ['<tr><td><tt>Out[<b>%s</b>]:</tt></td></tr>' % 
+                 output.prompt_number, '<td>']
 
         # output is a dictionary like object with type as a key
-        if 'latex' in output:
-            lines.append("<pre>")
-            lines.extend(indent(output.latex))
-            lines.append("</pre>")
+        for out_type in ('text', 'latex'):
+            if out_type in output:
+                lines.extend(self.in_tag('pre', indent(output[out_type])))
+
+        return lines
+
+    @DocInherit
+    def render_pyerr(self, output):
+        # Note: a traceback is a *list* of frames.
+        return self.in_tag('pre', remove_ansi('\n'.join(output.traceback)))
+
+    @DocInherit
+    def _img_lines(self, img_file):
+        return ['<img src="%s">' % img_file, '']
+
+    @DocInherit
+    def render_stream(self, output):
+        lines = []
 
         if 'text' in output:
-            lines.append("<pre>")
-            lines.extend(indent(output.text))
-            lines.append("</pre>")
+            lines.append(output.text)
 
         return lines
 
     @DocInherit
-    def render_display_data(self, output):
-        lines = []
+    def _unknown_lines(self, data):
+        return ['<h2>Warning:: Unknown cell</h2>'] + self.in_tag('pre', data)
+
 
-        if 'png' in output:
-            infile = 'nb_figure_%s.png' % self.figures_counter
-            fullname = os.path.join(self.dirpath, infile)
-            with open(fullname, 'w') as f:
-                f.write(output.png.decode('base64'))
+class ConverterLaTeX(Converter):
+    """Converts a notebook to a .tex file suitable for pdflatex.
 
-            self.figures_counter += 1
-            lines.append('<img src="%s">' % infile)
-            lines.append('')
+    Note: this converter *needs*:
+
+    - `pandoc`: for all conversion of markdown cells.  If your notebook only
+       has Raw cells, pandoc will not be needed.
+    
+    -  `inkscape`: if your notebook has SVG figures.  These need to be
+       converted to PDF before inclusion in the TeX file, as LaTeX doesn't
+       understand SVG natively.
+    
+    You will in general obtain much better final PDF results if you configure
+    the matplotlib backend to create SVG output with 
+
+    %config InlineBackend.figure_format = 'svg'
+
+    (or set the equivalent flag at startup or in your configuration profile).
+    """
+    extension = 'tex'
+    documentclass = 'article'
+    documentclass_options = '11pt,english'
+    heading_map = {1: r'\section',
+                   2: r'\subsection',
+                   3: r'\subsubsection',
+                   4: r'\paragraph',
+                   5: r'\subparagraph',
+                   6: r'\subparagraph'}
+
+    def in_env(self, environment, lines):
+        """Return list of environment lines for input lines
+
+        Parameters
+        ----------
+        env : string
+          Name of the environment to bracket with begin/end.
+
+        lines: """
+        out = [r'\begin{%s}' % environment]
+        if isinstance(lines, basestring):
+            out.append(lines)
+        else:  # list
+            out.extend(lines)
+        out.append(r'\end{%s}' % environment)
+        return out
+
+    def convert(self):
+        # The main body is done by the logic in the parent class, and that's
+        # all we need if preamble support has been turned off.
+        body = super(ConverterLaTeX, self).convert()
+        if not self.with_preamble:
+            return body
+        # But if preamble is on, then we need to construct a proper, standalone
+        # tex file.
+        
+        # Tag the document at the top and set latex class
+        final = [ r'%% This file was auto-generated by IPython, do NOT edit',
+                  r'%% Conversion from the original notebook file:',
+                  r'%% {0}'.format(self.infile),
+                  r'%%',
+                  r'\documentclass[%s]{%s}' % (self.documentclass_options,
+                                               self.documentclass),
+                  '',
+                 ]
+        # Load our own preamble, which is stored next to the main file.  We
+        # need to be careful in case the script entry point is a symlink
+        myfile = __file__ if not os.path.islink(__file__) else \
+          os.readlink(__file__)
+        with open(os.path.join(os.path.dirname(myfile), 'preamble.tex')) as f:
+            final.append(f.read())
+            
+        # Load any additional user-supplied preamble
+        if self.user_preamble:
+            final.extend(['', '%% Adding user preamble from file:',
+                          '%% {0}'.format(self.user_preamble), ''])
+            with open(self.user_preamble) as f:
+                final.append(f.read())
+                
+        # Include document body
+        final.extend([ r'\begin{document}', '',
+                       body,
+                       r'\end{document}', ''])
+        # Retun value must be a string
+        return '\n'.join(final)
+        
+    @DocInherit
+    def render_heading(self, cell):
+        marker = self.heading_map[cell.level]
+        return ['%s{%s}' % (marker, cell.source) ]
+
+    @DocInherit
+    def render_code(self, cell):
+        if not cell.input:
+            return []
+
+        # Cell codes first carry input code, we use lstlisting for that
+        lines = [r'\begin{codecell}']
+        
+        lines.extend(self.in_env('codeinput',
+                              self.in_env('lstlisting', cell.input)))
+
+        outlines = []
+        for output in cell.outputs:
+            conv_fn = self.dispatch(output.output_type)
+            outlines.extend(conv_fn(output))
+
+        # And then output of many possible types; use a frame for all of it.
+        if outlines:
+            lines.extend(self.in_env('codeoutput', outlines))
+
+        lines.append(r'\end{codecell}')
 
         return lines
 
+
+    @DocInherit
+    def _img_lines(self, img_file):
+        return self.in_env('center',
+                [r'\includegraphics[width=3in]{%s}' % img_file, r'\par'])
+
+    def _svg_lines(self, img_file):
+        base_file = os.path.splitext(img_file)[0]
+        pdf_file = base_file + '.pdf'
+        subprocess.check_call([ inkscape, '--export-pdf=%s' % pdf_file,
+                               img_file])
+        return self._img_lines(pdf_file)
+
     @DocInherit
     def render_stream(self, output):
         lines = []
 
         if 'text' in output:
-            lines.append(output.text)
+            lines.extend(self.in_env('verbatim', output.text.strip()))
+
+        return lines
+
+    @DocInherit
+    def render_markdown(self, cell):
+        return [markdown2latex(cell.source)]
+        
+    @DocInherit
+    def render_pyout(self, output):
+        lines = []
+
+        # output is a dictionary like object with type as a key
+        if 'latex' in output:
+            lines.extend(output.latex)
+
+        if 'text' in output:
+            lines.extend(self.in_env('verbatim', output.text))
 
         return lines
 
+    @DocInherit
+    def render_pyerr(self, output):
+        # Note: a traceback is a *list* of frames.
+        return self.in_env('traceback',
+                        self.in_env('verbatim', 
+                                 remove_ansi('\n'.join(output.traceback))))
+
+    @DocInherit
+    def render_raw(self, cell):
+        if self.raw_as_verbatim:
+            return self.in_env('verbatim', cell.source)
+        else:
+            return [cell.source]
+
+    @DocInherit
+    def _unknown_lines(self, data):
+        return [r'{\vspace{5mm}\bf WARNING:: unknown cell:}'] + \
+          self.in_env('verbatim', data)
+
+#-----------------------------------------------------------------------------
+# Standalone conversion functions
+#-----------------------------------------------------------------------------
+
 def rst2simplehtml(infile):
     """Convert a rst file to simplified html suitable for blogger.
 
@@ -355,7 +667,7 b' def rst2simplehtml(infile):'
 
     return newfname
 
-known_formats = "rst (default), html, quick-html"
+known_formats = "rst (default), html, quick-html, latex"
 
 def main(infile, format='rst'):
     """Convert a notebook to html in one step"""
@@ -373,11 +685,16 b" def main(infile, format='rst'):"
     elif format == 'quick-html':
         converter = ConverterQuickHTML(infile)
         rstfname = converter.render()
+    elif format == 'latex':
+        converter = ConverterLaTeX(infile)
+        latexfname = converter.render()
     else:
         raise SystemExit("Unknown format '%s', " % format +
                 "known formats are: " + known_formats)
 
-
+#-----------------------------------------------------------------------------
+# Script main
+#-----------------------------------------------------------------------------
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description=__doc__,

tests/test.ipynb

@@ -51,15 +51,12 b''
     {
      "cell_type": "markdown",
      "source": [
-      "A section heading",
-      "=================",
-      "",
       "A bit of text, with *important things*:",
       "",
       "* and",
-      "* more",
+      "* more that **are boldface**, as well as `verbatim`.",
       "",
-      "Using reST links to `ipython <http://ipython.org>`_."
+      "Using markdown hyperlinks for [ipython](http://ipython.org)."
      ]
     },
     {
@@ -67,21 +64,21 b''
      "collapsed": false,
      "input": [
       "f = figure()",
-      "plot([1])",
+      "plot([1,2,3])",
       "display(f)"
      ],
      "language": "python",
      "outputs": [
       {
        "output_type": "display_data",
-       "png": "iVBORw0KGgoAAAANSUhEUgAAAYAAAAD3CAYAAAAUl4NyAAAABHNCSVQICAgIfAhkiAAAAAlwSFlz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\nAABLEQAAYCkCAAAs9X/vh7DYicSaVQAAAABJRU5ErkJggg==\n",
+       "png": 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        "text": [
-        "<matplotlib.figure.Figure at 0x28f2750>"
+        "<matplotlib.figure.Figure at 0x981bccc>"
        ]
       },
       {
        "output_type": "display_data",
-       "png": 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CABISEoiOjmbYsGFERUXRvn17EhMTPV+1SD2lppqUHhZm9h0NDra7IhHPqXUpxm0n0lKM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\nz6ixi4j4GTV2ERE/8/9mUozJaDh2nQAAAABJRU5ErkJggg==\n"
       }
      ],
      "prompt_number": 1
@@ -128,7 +125,8 b''
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "hello world"
+        "hello world",
+        ""
        ]
       }
      ],
@@ -141,17 +139,70 b''
      ]
     },
     {
-     "cell_type": "plaintext",
+     "cell_type": "raw",
      "source": [
       "plain text"
      ]
     },
     {
      "cell_type": "code",
-     "collapsed": true,
-     "input": [],
+     "collapsed": false,
+     "input": [
+      "import sys",
+      "m = 'A message'",
+      "print m, 'to stdout'",
+      "print >> sys.stderr, m, 'to stderr'",
+      "m"
+     ],
      "language": "python",
-     "outputs": []
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "A message to stdout",
+        ""
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stderr",
+       "text": [
+        "A message to stderr",
+        ""
+       ]
+      },
+      {
+       "output_type": "pyout",
+       "prompt_number": 5,
+       "text": [
+        "'A message'"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# a traceback",
+      "1/0"
+     ],
+     "language": "python",
+     "outputs": [
+      {
+       "ename": "ZeroDivisionError",
+       "evalue": "integer division or modulo by zero",
+       "output_type": "pyerr",
+       "traceback": [
+        "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[1;31mZeroDivisionError\u001b[0m                         Traceback (most recent call last)",
+        "\u001b[1;32m/home/fperez/ipython/nbconvert/tests/<ipython-input-6-03412a6702b7>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m# a traceback\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[1;36m1\u001b[0m\u001b[1;33m/\u001b[0m\u001b[1;36m0\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
+        "\u001b[1;31mZeroDivisionError\u001b[0m: integer division or modulo by zero"
+       ]
+      }
+     ],
+     "prompt_number": 6
     }
    ]
   }