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nbsphinx.py
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nbsphinx.py
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# Copyright (c) 2015-2019 Matthias Geier
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""Jupyter Notebook Tools for Sphinx.
https://nbsphinx.readthedocs.io/
"""
__version__ = '0.4.3'
import copy
import json
import os
import re
import subprocess
try:
from urllib.parse import unquote # Python 3.x
from html.parser import HTMLParser
except ImportError:
from urllib2 import unquote # Python 2.x
from HTMLParser import HTMLParser
import docutils
from docutils.parsers import rst
import jinja2
import nbconvert
import nbformat
import sphinx
import sphinx.errors
import sphinx.transforms.post_transforms.images
import traitlets
_ipynbversion = 4
# See nbconvert/exporters/html.py:
DISPLAY_DATA_PRIORITY_HTML = (
'application/vnd.jupyter.widget-state+json',
'application/vnd.jupyter.widget-view+json',
'application/javascript',
'text/html',
'text/markdown',
'image/svg+xml',
'text/latex',
'image/png',
'image/jpeg',
'text/plain',
)
# See nbconvert/exporters/latex.py:
DISPLAY_DATA_PRIORITY_LATEX = (
'text/latex',
'application/pdf',
'image/png',
'image/jpeg',
'image/svg+xml',
'text/markdown',
'text/plain',
)
# The default rst template name is changing in nbconvert 6, so we substitute
# it in to the *extends* directive.
RST_TEMPLATE = """
{% extends '__RST_DEFAULT_TEMPLATE__' %}
{% macro insert_empty_lines(text) %}
{%- set before, after = text | get_empty_lines %}
{%- if before %}
:empty-lines-before: {{ before }}
{%- endif %}
{%- if after %}
:empty-lines-after: {{ after }}
{%- endif %}
{%- endmacro %}
{% block any_cell %}
{%- if cell.metadata.nbsphinx != 'hidden' %}
{{ super() }}
{% endif %}
{%- endblock any_cell %}
{% block input -%}
.. nbinput:: {% if cell.metadata.magics_language -%}
{{ cell.metadata.magics_language }}
{%- elif nb.metadata.language_info -%}
{{ nb.metadata.language_info.pygments_lexer or nb.metadata.language_info.name }}
{%- else -%}
{{ resources.codecell_lexer }}
{%- endif -%}
{{ insert_empty_lines(cell.source) }}
{%- if cell.execution_count %}
:execution-count: {{ cell.execution_count }}
{%- endif %}
{%- if not cell.outputs %}
:no-output:
{%- endif %}
{{ cell.source.strip('\n') | indent }}
{% endblock input %}
{% macro insert_nboutput(datatype, output, cell) -%}
.. nboutput::
{%- if output.output_type == 'execute_result' and cell.execution_count %}
:execution-count: {{ cell.execution_count }}
{%- endif %}
{%- if output != cell.outputs[-1] %}
:more-to-come:
{%- endif %}
{%- if output.name == 'stderr' %}
:class: stderr
{%- endif %}
{%- if datatype != 'text/plain' %}
:fancy:
{%- endif %}
{%- if datatype == 'text/plain' %}
.. rst-class:: highlight
.. raw:: html
<pre>
{{ output.data[datatype] | ansi2html | indent | indent }}
</pre>
.. raw:: latex
\\begin{sphinxVerbatim}[commandchars=\\\\\\{\\}]
{{ output.data[datatype] | escape_latex | ansi2latex | indent | indent }}
\\end{sphinxVerbatim}
{%- elif datatype in ['image/svg+xml', 'image/png', 'image/jpeg', 'application/pdf'] %}
.. image:: {{ output.metadata.filenames[datatype] | posix_path }}
{%- if datatype in output.metadata %}
{%- set width = output.metadata[datatype].width %}
{%- if width %}
:width: {{ width }}
{%- endif %}
{%- set height = output.metadata[datatype].height %}
{%- if height %}
:height: {{ height }}
{% endif %}
{% endif %}
{%- elif datatype in ['text/markdown'] %}
{{ output.data['text/markdown'] | markdown2rst | indent }}
{%- elif datatype in ['text/latex'] %}
.. math::
:nowrap:
{{ output.data['text/latex'] | indent | indent }}
{%- elif datatype == 'text/html' %}
:class: rendered_html
.. raw:: html
{{ output.data['text/html'] | indent | indent }}
{%- elif datatype == 'application/javascript' %}
.. raw:: html
<div></div>
<script type="text/javascript">
var element = document.currentScript.previousSibling.previousSibling;
{{ output.data['application/javascript'] | indent | indent }}
</script>
{%- elif datatype.startswith('application/vnd.jupyter') and datatype.endswith('+json') %}
.. raw:: html
<script type="{{ datatype }}">{{ output.data[datatype] | json_dumps }}</script>
{% else %}
.. nbwarning:: Data type cannot be displayed: {{ datatype }}
{%- endif %}
{% endmacro %}
{% block nboutput -%}
{%- set html_datatype, latex_datatype = output | get_output_type %}
{%- if html_datatype == latex_datatype %}
{{ insert_nboutput(html_datatype, output, cell) }}
{% else %}
.. only:: html
{{ insert_nboutput(html_datatype, output, cell) | indent }}
.. only:: latex
{{ insert_nboutput(latex_datatype, output, cell) | indent }}
{% endif %}
{% endblock nboutput %}
{% block execute_result %}{{ self.nboutput() }}{% endblock execute_result %}
{% block display_data %}{{ self.nboutput() }}{% endblock display_data %}
{% block stream %}{{ self.nboutput() }}{% endblock stream %}
{% block error %}{{ self.nboutput() }}{% endblock error %}
{% block markdowncell %}
{%- if 'nbsphinx-toctree' in cell.metadata %}
{{ cell | extract_toctree }}
{%- else %}
{{ cell | save_attachments or super() | replace_attachments }}
{% endif %}
{% endblock markdowncell %}
{% block rawcell %}
{%- set raw_mimetype = cell.metadata.get('raw_mimetype', '').lower() %}
{%- if raw_mimetype == '' %}
.. raw:: html
{{ cell.source | indent }}
.. raw:: latex
{{ cell.source | indent }}
{%- elif raw_mimetype == 'text/html' %}
.. raw:: html
{{ cell.source | indent }}
{%- elif raw_mimetype == 'text/latex' %}
.. raw:: latex
{{ cell.source | indent }}
{%- elif raw_mimetype == 'text/markdown' %}
..
{# Empty comment to make sure the preceding directive (if any) is closed #}
{{ cell.source | markdown2rst }}
{%- elif raw_mimetype == 'text/restructuredtext' %}
..
{# Empty comment to make sure the preceding directive (if any) is closed #}
{{ cell.source }}
{% endif %}
{% endblock rawcell %}
{% block footer %}
{% if 'application/vnd.jupyter.widget-state+json' in nb.metadata.widgets %}
.. raw:: html
<script type="application/vnd.jupyter.widget-state+json">
{{ nb.metadata.widgets['application/vnd.jupyter.widget-state+json'] | json_dumps }}
</script>
{% endif %}
{{ super() }}
{% endblock footer %}
""".replace('__RST_DEFAULT_TEMPLATE__', nbconvert.RSTExporter().template_file)
LATEX_PREAMBLE = r"""
% Jupyter Notebook code cell colors
\definecolor{nbsphinxin}{HTML}{307FC1}
\definecolor{nbsphinxout}{HTML}{BF5B3D}
\definecolor{nbsphinx-code-bg}{HTML}{F5F5F5}
\definecolor{nbsphinx-code-border}{HTML}{E0E0E0}
\definecolor{nbsphinx-stderr}{HTML}{FFDDDD}
% ANSI colors for output streams and traceback highlighting
\definecolor{ansi-black}{HTML}{3E424D}
\definecolor{ansi-black-intense}{HTML}{282C36}
\definecolor{ansi-red}{HTML}{E75C58}
\definecolor{ansi-red-intense}{HTML}{B22B31}
\definecolor{ansi-green}{HTML}{00A250}
\definecolor{ansi-green-intense}{HTML}{007427}
\definecolor{ansi-yellow}{HTML}{DDB62B}
\definecolor{ansi-yellow-intense}{HTML}{B27D12}
\definecolor{ansi-blue}{HTML}{208FFB}
\definecolor{ansi-blue-intense}{HTML}{0065CA}
\definecolor{ansi-magenta}{HTML}{D160C4}
\definecolor{ansi-magenta-intense}{HTML}{A03196}
\definecolor{ansi-cyan}{HTML}{60C6C8}
\definecolor{ansi-cyan-intense}{HTML}{258F8F}
\definecolor{ansi-white}{HTML}{C5C1B4}
\definecolor{ansi-white-intense}{HTML}{A1A6B2}
\definecolor{ansi-default-inverse-fg}{HTML}{FFFFFF}
\definecolor{ansi-default-inverse-bg}{HTML}{000000}
% Define an environment for non-plain-text code cell outputs (e.g. images)
\makeatletter
\newenvironment{nbsphinxfancyoutput}{%
% Avoid fatal error with framed.sty if graphics too long to fit on one page
\let\sphinxincludegraphics\nbsphinxincludegraphics
\nbsphinx@image@maxheight\textheight
\advance\nbsphinx@image@maxheight -2\fboxsep % default \fboxsep 3pt
\advance\nbsphinx@image@maxheight -2\fboxrule % default \fboxrule 0.4pt
\advance\nbsphinx@image@maxheight -\baselineskip
\def\nbsphinxfcolorbox{\spx@fcolorbox{nbsphinx-code-border}{white}}%
\def\FrameCommand{\nbsphinxfcolorbox\nbsphinxfancyaddprompt\@empty}%
\def\FirstFrameCommand{\nbsphinxfcolorbox\nbsphinxfancyaddprompt\sphinxVerbatim@Continues}%
\def\MidFrameCommand{\nbsphinxfcolorbox\sphinxVerbatim@Continued\sphinxVerbatim@Continues}%
\def\LastFrameCommand{\nbsphinxfcolorbox\sphinxVerbatim@Continued\@empty}%
\MakeFramed{\advance\hsize-\width\@totalleftmargin\z@\linewidth\hsize\@setminipage}%
\lineskip=1ex\lineskiplimit=1ex\raggedright%
}{\par\unskip\@minipagefalse\endMakeFramed}
\makeatother
\newbox\nbsphinxpromptbox
\def\nbsphinxfancyaddprompt{\ifvoid\nbsphinxpromptbox\else
\kern\fboxrule\kern\fboxsep
\copy\nbsphinxpromptbox
\kern-\ht\nbsphinxpromptbox\kern-\dp\nbsphinxpromptbox
\kern-\fboxsep\kern-\fboxrule\nointerlineskip
\fi}
\newlength\nbsphinxcodecellspacing
\setlength{\nbsphinxcodecellspacing}{0pt}
% Define support macros for attaching opening and closing lines to notebooks
\newsavebox\nbsphinxbox
\makeatletter
\newcommand{\nbsphinxstartnotebook}[1]{%
\par
% measure needed space
\setbox\nbsphinxbox\vtop{{#1\par}}
% reserve some space at bottom of page, else start new page
\needspace{\dimexpr2.5\baselineskip+\ht\nbsphinxbox+\dp\nbsphinxbox}
% mimick vertical spacing from \section command
\addpenalty\@secpenalty
\@tempskipa 3.5ex \@plus 1ex \@minus .2ex\relax
\addvspace\@tempskipa
{\Large\@tempskipa\baselineskip
\advance\@tempskipa-\prevdepth
\advance\@tempskipa-\ht\nbsphinxbox
\ifdim\@tempskipa>\z@
\vskip \@tempskipa
\fi}
\unvbox\nbsphinxbox
% if notebook starts with a \section, prevent it from adding extra space
\@nobreaktrue\everypar{\@nobreakfalse\everypar{}}%
% compensate the parskip which will get inserted by next paragraph
\nobreak\vskip-\parskip
% do not break here
\nobreak
}% end of \nbsphinxstartnotebook
\newcommand{\nbsphinxstopnotebook}[1]{%
\par
% measure needed space
\setbox\nbsphinxbox\vbox{{#1\par}}
\nobreak % it updates page totals
\dimen@\pagegoal
\advance\dimen@-\pagetotal \advance\dimen@-\pagedepth
\advance\dimen@-\ht\nbsphinxbox \advance\dimen@-\dp\nbsphinxbox
\ifdim\dimen@<\z@
% little space left
\unvbox\nbsphinxbox
\kern-.8\baselineskip
\nobreak\vskip\z@\@plus1fil
\penalty100
\vskip\z@\@plus-1fil
\kern.8\baselineskip
\else
\unvbox\nbsphinxbox
\fi
}% end of \nbsphinxstopnotebook
% Ensure height of an included graphics fits in nbsphinxfancyoutput frame
\newdimen\nbsphinx@image@maxheight % set in nbsphinxfancyoutput environment
\newcommand*{\nbsphinxincludegraphics}[2][]{%
\gdef\spx@includegraphics@options{#1}%
\setbox\spx@image@box\hbox{\includegraphics[#1,draft]{#2}}%
\in@false
\ifdim \wd\spx@image@box>\linewidth
\g@addto@macro\spx@includegraphics@options{,width=\linewidth}%
\in@true
\fi
% no rotation, no need to worry about depth
\ifdim \ht\spx@image@box>\nbsphinx@image@maxheight
\g@addto@macro\spx@includegraphics@options{,height=\nbsphinx@image@maxheight}%
\in@true
\fi
\ifin@
\g@addto@macro\spx@includegraphics@options{,keepaspectratio}%
\fi
\setbox\spx@image@box\box\voidb@x % clear memory
\expandafter\includegraphics\expandafter[\spx@includegraphics@options]{#2}%
}% end of "\MakeFrame"-safe variant of \sphinxincludegraphics
\makeatother
\makeatletter
\renewcommand*\sphinx@verbatim@nolig@list{\do\'\do\`}
\begingroup
\catcode`'=\active
\let\nbsphinx@noligs\@noligs
\g@addto@macro\nbsphinx@noligs{\let'\PYGZsq}
\endgroup
\makeatother
\renewcommand*\sphinxbreaksbeforeactivelist{\do\<\do\"\do\'}
\renewcommand*\sphinxbreaksafteractivelist{\do\.\do\,\do\:\do\;\do\?\do\!\do\/\do\>\do\-}
\makeatletter
\fvset{codes*=\sphinxbreaksattexescapedchars\do\^\^\let\@noligs\nbsphinx@noligs}
\makeatother
"""
CSS_STRING = """
/* CSS for nbsphinx extension */
/* remove conflicting styling from Sphinx themes */
div.nbinput.container,
div.nbinput.container div.prompt,
div.nbinput.container div.input_area,
div.nbinput.container div[class*=highlight],
div.nbinput.container div[class*=highlight] pre,
div.nboutput.container,
div.nboutput.container div.prompt,
div.nboutput.container div.output_area,
div.nboutput.container div[class*=highlight],
div.nboutput.container div[class*=highlight] pre {
background: none;
border: none;
padding: 0 0;
margin: 0;
box-shadow: none;
}
/* avoid gaps between output lines */
div.nboutput.container div[class*=highlight] pre {
line-height: normal;
}
/* input/output containers */
div.nbinput.container,
div.nboutput.container {
display: -webkit-flex;
display: flex;
align-items: flex-start;
margin: 0;
width: 100%%;
}
@media (max-width: %(nbsphinx_responsive_width)s) {
div.nbinput.container,
div.nboutput.container {
flex-direction: column;
}
}
/* input container */
div.nbinput.container {
padding-top: 5px;
}
/* last container */
div.nblast.container {
padding-bottom: 5px;
}
/* input prompt */
div.nbinput.container div.prompt pre {
color: #307FC1;
}
/* output prompt */
div.nboutput.container div.prompt pre {
color: #BF5B3D;
}
/* all prompts */
div.nbinput.container div.prompt,
div.nboutput.container div.prompt {
min-width: %(nbsphinx_prompt_width)s;
padding-top: 0.4em;
padding-right: 0.4em;
text-align: right;
flex: 0;
}
@media (max-width: %(nbsphinx_responsive_width)s) {
div.nbinput.container div.prompt,
div.nboutput.container div.prompt {
text-align: left;
padding: 0.4em;
}
div.nboutput.container div.prompt.empty {
padding: 0;
}
}
/* disable scrollbars on prompts */
div.nbinput.container div.prompt pre,
div.nboutput.container div.prompt pre {
overflow: hidden;
}
/* input/output area */
div.nbinput.container div.input_area,
div.nboutput.container div.output_area {
padding: 0.4em;
-webkit-flex: 1;
flex: 1;
overflow: auto;
}
@media (max-width: %(nbsphinx_responsive_width)s) {
div.nbinput.container div.input_area,
div.nboutput.container div.output_area {
width: 100%%;
}
}
/* input area */
div.nbinput.container div.input_area {
border: 1px solid #e0e0e0;
border-radius: 2px;
background: #f5f5f5;
}
/* override MathJax center alignment in output cells */
div.nboutput.container div[class*=MathJax] {
text-align: left !important;
}
/* override sphinx.ext.imgmath center alignment in output cells */
div.nboutput.container div.math p {
text-align: left;
}
/* standard error */
div.nboutput.container div.output_area.stderr {
background: #fdd;
}
/* ANSI colors */
.ansi-black-fg { color: #3E424D; }
.ansi-black-bg { background-color: #3E424D; }
.ansi-black-intense-fg { color: #282C36; }
.ansi-black-intense-bg { background-color: #282C36; }
.ansi-red-fg { color: #E75C58; }
.ansi-red-bg { background-color: #E75C58; }
.ansi-red-intense-fg { color: #B22B31; }
.ansi-red-intense-bg { background-color: #B22B31; }
.ansi-green-fg { color: #00A250; }
.ansi-green-bg { background-color: #00A250; }
.ansi-green-intense-fg { color: #007427; }
.ansi-green-intense-bg { background-color: #007427; }
.ansi-yellow-fg { color: #DDB62B; }
.ansi-yellow-bg { background-color: #DDB62B; }
.ansi-yellow-intense-fg { color: #B27D12; }
.ansi-yellow-intense-bg { background-color: #B27D12; }
.ansi-blue-fg { color: #208FFB; }
.ansi-blue-bg { background-color: #208FFB; }
.ansi-blue-intense-fg { color: #0065CA; }
.ansi-blue-intense-bg { background-color: #0065CA; }
.ansi-magenta-fg { color: #D160C4; }
.ansi-magenta-bg { background-color: #D160C4; }
.ansi-magenta-intense-fg { color: #A03196; }
.ansi-magenta-intense-bg { background-color: #A03196; }
.ansi-cyan-fg { color: #60C6C8; }
.ansi-cyan-bg { background-color: #60C6C8; }
.ansi-cyan-intense-fg { color: #258F8F; }
.ansi-cyan-intense-bg { background-color: #258F8F; }
.ansi-white-fg { color: #C5C1B4; }
.ansi-white-bg { background-color: #C5C1B4; }
.ansi-white-intense-fg { color: #A1A6B2; }
.ansi-white-intense-bg { background-color: #A1A6B2; }
.ansi-default-inverse-fg { color: #FFFFFF; }
.ansi-default-inverse-bg { background-color: #000000; }
.ansi-bold { font-weight: bold; }
.ansi-underline { text-decoration: underline; }
/* Some additional styling taken form the Jupyter notebook CSS */
div.rendered_html table {
border: none;
border-collapse: collapse;
border-spacing: 0;
color: black;
font-size: 12px;
table-layout: fixed;
}
div.rendered_html thead {
border-bottom: 1px solid black;
vertical-align: bottom;
}
div.rendered_html tr,
div.rendered_html th,
div.rendered_html td {
text-align: right;
vertical-align: middle;
padding: 0.5em 0.5em;
line-height: normal;
white-space: normal;
max-width: none;
border: none;
}
div.rendered_html th {
font-weight: bold;
}
div.rendered_html tbody tr:nth-child(odd) {
background: #f5f5f5;
}
div.rendered_html tbody tr:hover {
background: rgba(66, 165, 245, 0.2);
}
"""
CSS_STRING_READTHEDOCS = """
/* CSS overrides for sphinx_rtd_theme */
/* 24px margin */
.nbinput.nblast.container,
.nboutput.nblast.container {
margin-bottom: 19px; /* padding has already 5px */
}
/* ... except between code cells! */
.nblast.container + .nbinput.container {
margin-top: -19px;
}
.admonition > p:before {
margin-right: 4px; /* make room for the exclamation icon */
}
/* Fix math alignment, see https://github.com/rtfd/sphinx_rtd_theme/pull/686 */
.math {
text-align: unset;
}
"""
CSS_STRING_CLOUD = """
/* CSS overrides for cloud theme */
/* nicer titles and more space for info and warning logos */
div.admonition p.admonition-title {
background: rgba(0, 0, 0, .05);
margin: .5em -1em;
margin-top: -.5em !important;
padding: .5em .5em .5em 2.65em;
}
/* indent single paragraph */
div.admonition {
text-indent: 20px;
}
/* don't indent multiple paragraphs */
div.admonition > p {
text-indent: 0;
}
/* remove excessive padding */
div.admonition.inline-title p.admonition-title {
padding-left: .2em;
}
"""
class Exporter(nbconvert.RSTExporter):
"""Convert Jupyter notebooks to reStructuredText.
Uses nbconvert to convert Jupyter notebooks to a reStructuredText
string with custom reST directives for input and output cells.
Notebooks without output cells are automatically executed before
conversion.
"""
def __init__(self, execute='auto', kernel_name='', execute_arguments=[],
allow_errors=False, timeout=30, codecell_lexer='none'):
"""Initialize the Exporter."""
# NB: The following stateful Jinja filters are a hack until
# template-based processing is dropped
# (https://github.com/spatialaudio/nbsphinx/issues/36) or someone
# comes up with a better idea.
# NB: This instance-local state makes the methods non-reentrant!
attachment_storage = []
def save_attachments(cell):
for filename, bundle in cell.get('attachments', {}).items():
attachment_storage.append((filename, bundle))
def replace_attachments(text):
for filename, bundle in attachment_storage:
# For now, this works only if there is a single MIME bundle
(mime_type, data), = bundle.items()
text = re.sub(
r'^(\s*\.\. (\|[^|]*\| image|figure)::) attachment:{0}$'
.format(filename),
r'\1 data:{0};base64,{1}'.format(mime_type, data),
text, flags=re.MULTILINE)
del attachment_storage[:]
return text
self._execute = execute
self._kernel_name = kernel_name
self._execute_arguments = execute_arguments
self._allow_errors = allow_errors
self._timeout = timeout
self._codecell_lexer = codecell_lexer
loader = jinja2.DictLoader({'nbsphinx-rst.tpl': RST_TEMPLATE})
super(Exporter, self).__init__(
template_file='nbsphinx-rst.tpl', extra_loaders=[loader],
config=traitlets.config.Config({
'HighlightMagicsPreprocessor': {'enabled': True},
# Work around https://github.com/jupyter/nbconvert/issues/720:
'RegexRemovePreprocessor': {'enabled': False},
}),
filters={
'convert_pandoc': convert_pandoc,
'markdown2rst': markdown2rst,
'get_empty_lines': _get_empty_lines,
'extract_toctree': _extract_toctree,
'save_attachments': save_attachments,
'replace_attachments': replace_attachments,
'get_output_type': _get_output_type,
'json_dumps': json.dumps,
})
def from_notebook_node(self, nb, resources=None, **kw):
nb = copy.deepcopy(nb)
if resources is None:
resources = {}
else:
resources = copy.deepcopy(resources)
# Set default codecell lexer
resources['codecell_lexer'] = self._codecell_lexer
nbsphinx_metadata = nb.metadata.get('nbsphinx', {})
execute = nbsphinx_metadata.get('execute', self._execute)
if execute not in ('always', 'never', 'auto'):
raise ValueError('invalid execute option: {!r}'.format(execute))
auto_execute = (
execute == 'auto' and
# At least one code cell actually containing source code:
any(c.source for c in nb.cells if c.cell_type == 'code') and
# No outputs, not even a prompt number:
not any(c.get('outputs') or c.get('execution_count')
for c in nb.cells if c.cell_type == 'code')
)
if auto_execute or execute == 'always':
allow_errors = nbsphinx_metadata.get(
'allow_errors', self._allow_errors)
timeout = nbsphinx_metadata.get('timeout', self._timeout)
pp = nbconvert.preprocessors.ExecutePreprocessor(
kernel_name=self._kernel_name,
extra_arguments=self._execute_arguments,
allow_errors=allow_errors, timeout=timeout)
nb, resources = pp.preprocess(nb, resources)
# Call into RSTExporter
rststr, resources = super(Exporter, self).from_notebook_node(
nb, resources, **kw)
orphan = nbsphinx_metadata.get('orphan', False)
if orphan is True:
resources['nbsphinx_orphan'] = True
elif orphan is not False:
raise ValueError('invalid orphan option: {!r}'.format(orphan))
if 'application/vnd.jupyter.widget-state+json' in nb.metadata.get(
'widgets', {}):
resources['nbsphinx_widgets'] = True
return rststr, resources
class NotebookParser(rst.Parser):
"""Sphinx source parser for Jupyter notebooks.
Uses nbsphinx.Exporter to convert notebook content to a
reStructuredText string, which is then parsed by Sphinx's built-in
reST parser.
"""
supported = 'jupyter_notebook',
def get_transforms(self):
"""List of transforms for documents parsed by this parser."""
return rst.Parser.get_transforms(self) + [
CreateNotebookSectionAnchors,
ReplaceAlertDivs,
CopyLinkedFiles,
]
def parse(self, inputstring, document):
"""Parse *inputstring*, write results to *document*.
*inputstring* is either the JSON representation of a notebook,
or a paragraph of text coming from the Sphinx translation
machinery.
Note: For now, the translation strings use reST formatting,
because the NotebookParser uses reST as intermediate
representation.
However, there are plans to remove this intermediate step
(https://github.com/spatialaudio/nbsphinx/issues/36), and after
that, the translated strings will most likely be parsed as
CommonMark.
If the configuration value "nbsphinx_custom_formats" is
specified, the input string is converted to the Jupyter notebook
format with the given conversion function.
"""
env = document.settings.env
formats = {
'.ipynb': lambda s: nbformat.reads(s, as_version=_ipynbversion)}
formats.update(env.config.nbsphinx_custom_formats)
suffix = os.path.splitext(env.doc2path(env.docname))[1]
try:
converter = formats[suffix]
except KeyError:
raise NotebookError('No converter for suffix {!r}'.format(suffix))
if isinstance(converter, str):
converter = sphinx.util.import_object(converter)
try:
nb = converter(inputstring)
except Exception:
# NB: The use of the RST parser is temporary!
rst.Parser.parse(self, inputstring, document)
return
srcdir = os.path.dirname(env.doc2path(env.docname))
auxdir = os.path.join(env.doctreedir, 'nbsphinx')
sphinx.util.ensuredir(auxdir)
resources = {}
# Working directory for ExecutePreprocessor
resources['metadata'] = {'path': srcdir}
# Sphinx doesn't accept absolute paths in images etc.
resources['output_files_dir'] = os.path.relpath(auxdir, srcdir)
resources['unique_key'] = re.sub('[/ ]', '_', env.docname)
exporter = Exporter(
execute=env.config.nbsphinx_execute,
kernel_name=env.config.nbsphinx_kernel_name,
execute_arguments=env.config.nbsphinx_execute_arguments,
allow_errors=env.config.nbsphinx_allow_errors,
timeout=env.config.nbsphinx_timeout,
codecell_lexer=env.config.nbsphinx_codecell_lexer,
)
try:
rststring, resources = exporter.from_notebook_node(nb, resources)
except nbconvert.preprocessors.execute.CellExecutionError as e:
lines = str(e).split('\n')
lines[0] = 'CellExecutionError in {}:'.format(
env.doc2path(env.docname, base=None))
lines.append("You can ignore this error by setting the following "
"in conf.py:\n\n nbsphinx_allow_errors = True\n")
raise NotebookError('\n'.join(lines))
except Exception as e:
raise NotebookError(type(e).__name__ + ' in ' +
env.doc2path(env.docname, base=None) + ':\n' +
str(e))
rststring = """
.. role:: nbsphinx-math(raw)
:format: latex + html
:class: math
..
""" + rststring
# Create additional output files (figures etc.),
# see nbconvert.writers.FilesWriter.write()
for filename, data in resources.get('outputs', {}).items():
dest = os.path.normpath(os.path.join(srcdir, filename))
with open(dest, 'wb') as f:
f.write(data)
if resources.get('nbsphinx_orphan', False):
rst.Parser.parse(self, ':orphan:', document)
if env.config.nbsphinx_prolog:
prolog = exporter.environment.from_string(
env.config.nbsphinx_prolog).render(env=env)
rst.Parser.parse(self, prolog, document)
rst.Parser.parse(self, rststring, document)
if env.config.nbsphinx_epilog:
epilog = exporter.environment.from_string(
env.config.nbsphinx_epilog).render(env=env)
rst.Parser.parse(self, epilog, document)
if resources.get('nbsphinx_widgets', False):
if not hasattr(env, 'nbsphinx_widgets'):
env.nbsphinx_widgets = set()
env.nbsphinx_widgets.add(env.docname)
class NotebookError(sphinx.errors.SphinxError):
"""Error during notebook parsing."""
category = 'Notebook error'
class CodeAreaNode(docutils.nodes.Element):
"""Input area or plain-text output area of a Jupyter notebook code cell."""
class FancyOutputNode(docutils.nodes.Element):
"""A custom node for non-plain-text output of code cells."""
def _create_code_nodes(directive):
"""Create nodes for an input or output code cell."""
directive.state.document['nbsphinx_include_css'] = True
execution_count = directive.options.get('execution-count')
config = directive.state.document.settings.env.config
if isinstance(directive, NbInput):
outer_classes = ['nbinput']
if 'no-output' in directive.options:
outer_classes.append('nblast')
inner_classes = ['input_area']
prompt_template = config.nbsphinx_input_prompt
if not execution_count:
execution_count = ' '
elif isinstance(directive, NbOutput):
outer_classes = ['nboutput']
if 'more-to-come' not in directive.options:
outer_classes.append('nblast')
inner_classes = ['output_area']
inner_classes.append(directive.options.get('class', ''))
prompt_template = config.nbsphinx_output_prompt
else:
assert False
outer_node = docutils.nodes.container(classes=outer_classes)
if execution_count:
prompt = prompt_template % (execution_count,)
prompt_node = docutils.nodes.literal_block(
prompt, prompt, language='none', classes=['prompt'])
else:
prompt = ''
prompt_node = docutils.nodes.container(classes=['prompt', 'empty'])
# NB: Prompts are added manually in LaTeX output
outer_node += sphinx.addnodes.only('', prompt_node, expr='html')
if isinstance(directive, NbInput):
text = '\n'.join(directive.content.data)
if directive.arguments:
language = directive.arguments[0]
else:
language = 'none'
inner_node = docutils.nodes.literal_block(
text, text, language=language, classes=inner_classes)
else:
inner_node = docutils.nodes.container(classes=inner_classes)
sphinx.util.nodes.nested_parse_with_titles(
directive.state, directive.content, inner_node)
if 'fancy' in directive.options:
outer_node += FancyOutputNode('', inner_node, prompt=prompt)
else:
codearea_node = CodeAreaNode(
'', inner_node, prompt=prompt, stderr='stderr' in inner_classes)
# See http://stackoverflow.com/q/34050044/.
for attr in 'empty-lines-before', 'empty-lines-after':
value = directive.options.get(attr, 0)
if value:
codearea_node[attr] = value
outer_node += codearea_node
return [outer_node]
class AdmonitionNode(docutils.nodes.Element):
"""A custom node for info and warning boxes."""
# See http://docutils.sourceforge.net/docs/howto/rst-directives.html
class NbInput(rst.Directive):
"""A notebook input cell with prompt and code area."""
required_arguments = 0
optional_arguments = 1 # lexer name
final_argument_whitespace = False
option_spec = {
'execution-count': rst.directives.positive_int,
'empty-lines-before': rst.directives.nonnegative_int,
'empty-lines-after': rst.directives.nonnegative_int,
'no-output': rst.directives.flag,
}
has_content = True
def run(self):