diff --git a/nb2html.py b/nb2html.py new file mode 100755 index 0000000..8a4b160 --- /dev/null +++ b/nb2html.py @@ -0,0 +1,186 @@ +#!/usr/bin/env python +"""A really simple notebook to rst/html exporter. + +Usage + + ./nb2html.py file.ipynb + +Produces 'file.rst' and 'file.html', along with auto-generated figure files +called nb_figure_NN.png. + +""" + +import os +import subprocess +import sys + +from IPython.nbformat import current as nbformat +from IPython.utils.text import wrap_paragraphs, indent + + +# Cell converters + +def unknown_cell(cell): + """Default converter for cells of unknown type. + """ + + return [rst_directive('.. warning:: Unknown cell'), + repr(cell)] + +def markdown_cell(cell): + """convert a markdown cell to rst + + Returns list.""" + return [cell.source] + + +def rst_directive(directive, text): + return [directive, '', indent(text), ''] + +def code_cell(cell): + """Convert a code cell to rst + + Returns list.""" + + if not cell.input: + return [] + + lines = ['In[%s]:' % cell.prompt_number, ''] + lines.extend(rst_directive('.. code:: python', cell.input)) + + for output in cell.outputs: + conv = converters[output.output_type] + lines.extend(conv(output)) + + return lines + +# Converters for parts of a cell. +figures_counter = 1 + +def out_display(output): + """convert display data from the output of a code cell to rst. + + Returns list. + """ + global figures_counter + + lines = [] + + if 'png' in output: + fname = 'nb_figure_%s.png' % figures_counter + with open(fname, 'w') as f: + f.write(output.png.decode('base64')) + + figures_counter += 1 + lines.append('.. image:: %s' % fname) + lines.append('') + + return lines + + +def out_pyout(output): + """convert pyout part of a code cell to rst + + Returns list.""" + + lines = ['Out[%s]:' % output.prompt_number, ''] + + if 'latex' in output: + lines.extend(rst_directive('.. math::', output.latex)) + + if 'text' in output: + lines.extend(rst_directive('.. parsed-literal::', output.text)) + + return lines + + +converters = dict(code = code_cell, + markdown = markdown_cell, + pyout = out_pyout, + display_data = out_display, + ) + + + +def convert_notebook(nb): + lines = [] + for cell in nb.worksheets[0].cells: + conv = converters.get(cell.cell_type, unknown_cell) + lines.extend(conv(cell)) + lines.append('') + + return '\n'.join(lines) + + +def nb2rst(fname): + "Convert notebook to rst" + + with open(fname) as f: + nb = nbformat.read(f, 'json') + + rst = convert_notebook(nb) + + newfname = os.path.splitext(fname)[0] + '.rst' + with open(newfname, 'w') as f: + f.write(rst.encode('utf8')) + + return newfname + + +def rst2simplehtml(fname): + """Convert a rst file to simplified html suitable for blogger. + + This just runs rst2html with certain parameters to produce really simple + html and strips the document header, so the resulting file can be easily + pasted into a blogger edit window. + """ + + # This is the template for the rst2html call that produces the cleanest, + # simplest html I could find. This should help in making it easier to + # paste into the blogspot html window, though I'm still having problems + # with linebreaks there... + cmd_template = ("rst2html --link-stylesheet --no-xml-declaration " + "--no-generator --no-datestamp --no-source-link " + "--no-toc-backlinks --no-section-numbering " + "--strip-comments ") + + cmd = "%s %s" % (cmd_template, fname) + proc = subprocess.Popen(cmd, + stdout=subprocess.PIPE, + stderr=subprocess.PIPE, + shell=True) + html, stderr = proc.communicate() + if stderr: + raise IOError(stderr) + + # Make an iterator so breaking out holds state. Our implementation of + # searching for the html body below is basically a trivial little state + # machine, so we need this. + walker = iter(html.splitlines()) + + # Find start of main text, break out to then print until we find end /div. + # This may only work if there's a real title defined so we get a 'div class' + # tag, I haven't really tried. + for line in walker: + if line.startswith('
'): + break + f.write(line) + f.write('\n') + + return newfname + + +def main(fname): + """Convert a notebook to html in one step""" + newfname = nb2rst(fname) + rst2simplehtml(newfname) + + +if __name__ == '__main__': + main(sys.argv[1]) diff --git a/test.ipynb b/test.ipynb new file mode 100644 index 0000000..f743b5c --- /dev/null +++ b/test.ipynb @@ -0,0 +1,147 @@ +{ + "metadata": { + "name": "test" + }, + "nbformat": 3, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "source": [ + "H1" + ] + }, + { + "cell_type": "heading", + "level": 2, + "source": [ + "H2" + ] + }, + { + "cell_type": "heading", + "level": 3, + "source": [ + "H3" + ] + }, + { + "cell_type": "heading", + "level": 4, + "source": [ + "H4" + ] + }, + { + "cell_type": "heading", + "level": 5, + "source": [ + "H5" + ] + }, + { + "cell_type": "heading", + "level": 6, + "source": [ + "H6" + ] + }, + { + "cell_type": "markdown", + "source": [ + "A section heading", + "=================", + "", + "A bit of text, with *important things*:", + "", + "* and", + "* more", + "", + "Using reST links to `ipython `_." + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "f = figure()", + "plot([1])", + "display(f)" + ], + "language": "python", + "outputs": [ + { + "output_type": "display_data", + "png": 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+ } + ], + "prompt_number": 1 + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "# multiline input", + "x = 1", + "y = 2" + ], + "language": "python", + "outputs": [], + "prompt_number": 2 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "1+2" + ], + "language": "python", + "outputs": [ + { + "output_type": "pyout", + "prompt_number": 3, + "text": [ + "3" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "print 'hello world'" + ], + "language": "python", + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "hello world" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "code", + "collapsed": true, + "input": [], + "language": "python", + "outputs": [] + } + ] + } + ] +} \ No newline at end of file