Sphinx autodoc - automated API documentation (PyCon APAC 2015 in Taiwan)
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Transcript of Sphinx autodoc - automated API documentation (PyCon APAC 2015 in Taiwan)
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Sphinx autodocautomated API documentation
Takayuki Shimizukawa
Sphinx co-maintainer
Sphinx-users.jp
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Who am I
@shimizukawa
1. Sphinx co-maintainer
2. Sphinx-users.jp
3. PyCon JP committee
BePROUD co, ltd.2
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http://pycon.jp/
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Early Bird Registration: 210 tickets.
Speaker Call for Proposals: until July 15th.
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180 tickets gone
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Sphinx autodoc
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Do you know the docstring?
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1. def dumps(obj, ensure_ascii=True):2. """Serialize ``obj`` to a JSON formatted
``str``.3. """4. 5. ...6. return ...
Line 2,3 is a docstring
You can see the string by "help(dumps)"
Docstring
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Have you writtenAPI docs
using docstrings?
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What is the reason you do not write docstrings.
I don't know what/where should I write.
Are there some docstring format spec?
It's not beneficial.
I'll tell you a good way to write the docstrings.
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Goal of this session
How to generate a doc from Python source code.
re-discovering the meaning of docstrings.
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Sphinx introduction& How to setup it
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What is Sphinx?
Sphinx is a Open Source documentation generator.
Sphinx was created to generate Python official library's document.
Sphinx generates doc as several output formats from the reST text markup.
Sphinx
reSTreSTreStructuredTe
xt(reST)
reST Parser
HTML Builder
ePub Builder
LaTeX Builder texlive
HTMLtheme
Favorite Editor
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Many docs are written by Sphinx
For examples
Python libraries/tools:Python, Sphinx, Flask, Jinja2, Django, Pyramid, SQLAlchemy, Numpy, SciPy, scikit-learn, pandas, fabric, ansible, awscli, …
Non python libraries/tools:Chef, CakePHP(2.x), MathJax, Selenium, Varnish
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Relation between Sphinx and Docutils
Sphinx based upon Docutils library
Docutils/Sphinx supports reStructuredText it called reST, it's an extensible markup(PEP287 / accepted at 2002)
Sphinx
reST Parser
HTML Builder
ePub Builder
LaTeX Builder
HTMLtheme
docutils
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Comparing Docutils and Sphinx
Docutils Sphinx
1. Single page
2. Link to others with full name
3. Cross reference in a page
4. Writers: html, latex, man, xml, ...
5. Standard reST markup specs
1. Multiple Pages
2. toctree to connect all pages under single tree structure
3. Cross reference over each other pages
4. Additional writers: html(w/ themes), pdf(latex), texinfo, epub, …
5. Additional markup specs:autodoc directive and so on
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1. Sphinx introduction & Setup for i18n
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Sphinx extensions (built-in)
Sphinx extensions extend reST markup and provide extra writers.
Sphinx provides these extensions to support automated API documentation.
sphinx.ext.autodocsphinx.ext.autosummarysphinx.ext.doctestsphinx.ext.coverage
Sphinx
reST Parser
HTML Builder
ePub Builder
LaTeX Builder
docutils
au
tosu
mm
ary
au
tod
oc
doctest
coverage
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library code example
1. "utility functions"2. 3. def dumps(obj, ensure_ascii=True):4. """Serialize ``obj`` to a JSON formatted
``str``.5. """6. ...
deep_thought/utils.py
$ tree /path/to/your-code+- deep_thought| +- __init__.py| +- api.py| +- calc.py| +- utils.py+- setup.py
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$ pip install sphinx
Your code and sphinx should be in single python environment.
Python version is also important.
How to install Sphinx
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$ cd /path/to/your-code$ sphinx-quickstart doc -m...Project name: Deep thoughtAuthor name(s): MiceProject version: 0.7.5......Finished
"-m" to generate minimal Makefile/make.bat-m is important to introduce this session easily.
How to start a Sphinx project
Keep pressing ENTER key
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Create a doc directory
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$ cd doc$ make html...Build finished. The HTML pages are in _build/html.
"make html" command generates html files into _build/html.
make html once
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Current files structure
$ tree /path/to/your-code+- deep_thought| +- __init__.py| +- api.py| +- calc.py| +- utils.py+- doc| +- _build/| | +- html/ | +- _static/| +- _template/| +- conf.py| +- index.rst| +- make.bat| +- Makefile+- setup.py
Scaffold files
Build output
Library files
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Generate API docs from your python source code
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$ tree /path/to/your-code+- deep_thought| +- __init__.py| +- api.py| +- calc.py| +- utils.py+- doc| +- _build/| | +- html/ | +- _static/| +- _template/| +- conf.py| +- index.rst| +- make.bat| +- Makefile+- setup.py
1. import os2. import sys3. sys.path.insert(0,
os.path.abspath('..'))4. extensions = [5. 'sphinx.ext.autodoc',6. ]
setup autodoc extensiondoc/conf.py
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Line-3: add your library path to import them from Sphinx autodoc.
Line-5: add 'sphinx.ext.autodoc' to use the extension.
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Add automodule directive to your doc
1. Deep thought API2. ================3. 4. .. automodule:: deep_thought.utils5. :members:6.
1. "utility functions"2. 3. def dumps(obj, ensure_ascii=True):4. """Serialize ``obj`` to a JSON formatted
``str``.5. """6. ...
doc/index.rst
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deep_thought/utils.pyLine-4: automodule directive import
specified module and inspect the module.
Line-5: :members: option will inspects all members of module not only module docstring.
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$ cd doc$ make html...Build finished. The HTML pages are in _build/html.
make html
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How does it work?
autodoc directive generates intermediate reST internally:1. Deep thought API2. ================3. 4. .. py:module:: deep_thought.utils5. 6. utility functions7. 8. .. py:function:: dumps(obj, ensure_ascii=True)9. :module: deep_thought.utils10. 11. Serialize ``obj`` to a JSON formatted :class:`str`.
doc/index.rst
IntermediatereST
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$ make html SPHINXOPTS=-vvv......[autodoc] output:
.. py:module:: deep_thought.utils
utility functions
.. py:function:: dumps(obj, ensure_ascii=True) :module: deep_thought.utils
Serialize ``obj`` to a JSON formatted :class:`str`.
You can see the reST with -vvv option
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Take care!
Sphinx autodoc import your code
to get docstrings.
It means autodoc will execute code at module global level.
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Danger code
1. import os2. 3. def delete_world():4. os.system('sudo rm -Rf /')5. 6. delete_world() # will be executed at "make html"
danger.py
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execution guard on import
1. import os2. 3. def delete_world():4. os.system('sudo rm -Rf /')5. 6. delete_world() # will be executed at "make html"
danger.py
1. import os2. 3. def delete_world():4. os.system('sudo rm -Rf /')5. 6. if __name__ == '__main__':7. delete_world() # doesn't execute at "make
html"
safer.py
Execution guard
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execution guard on import
1. import os2. 3. def delete_world():4. os.system('sudo rm -Rf /')5. 6. delete_world() # will be executed at "make html"
danger.py
1. import os2. 3. def delete_world():4. os.system('sudo rm -Rf /')5. 6. if __name__ == '__main__':7. delete_world() # doesn't execute at "make
html"
safer.py
Execution guard
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"Oh, I can't understand the type of arguments and meanings even reading this!"
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Lacking necessary information
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1. def dumps(obj, ensure_ascii=True):2. """Serialize ``obj`` to a JSON formatted3. :class:`str`.4. 5. :param dict obj: dict type object to
serialize.6. :param bool ensure_ascii: Default is True. If7. False, all non-ASCII characters are
not ...8. :return: JSON formatted string9. :rtype: str10. """http://sphinx-doc.org/domains.html#info-field-
lists
"info field lists" for arguments
deep_thought/utils.py
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def dumps(obj, ensure_ascii=True): """Serialize ``obj`` to a JSON formatted :class:`str`.
:param dict obj: dict type object to serialize. :param bool ensure_ascii: Default is True. If False, all non-ASCII characters are not ... :return: JSON formatted string :rtype: str """ ...
"info field lists" for arguments
deep_thought/utils.py
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Cross-reference to functions
1. Examples2. ==========3. 4. This is a usage
of :func:`deep_thought.utils.dumps` blah blah blah. ...
examples.py
reference(hyper link)
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Detect deviations of the impl and doc
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Code example in a docstring
1. def dumps(obj, ensure_ascii=True):2. """Serialize ``obj`` to a JSON formatted3. :class:`str`.4. 5. For example:6. 7. >>> from deep_thought.utils import dumps8. >>> data = dict(spam=1, ham='egg')9. >>> dumps(data)10. '{spam: 1, ham: "egg"}'11. 12. :param dict obj: dict type object to
serialize.13. :param bool ensure_ascii: Default is True. If14. False, all non-ASCII characters are
not ...
deep_thought/utils.py
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doctestblock
You can copy & paste the red lines from python interactive
shell.
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Syntax highlighted output
$ make html...
rendereddoctestblock
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You can expect that developers will update code examples when the interface is changed.
We expect ...
1. def dumps(obj, ensure_ascii=True):2. """Serialize ``obj`` to a JSON formatted3. :class:`str`.4. 5. For example:6. 7. >>> from deep_thought.utils import dumps8. >>> data = dict(spam=1, ham='egg')9. >>> dumps(data)10. '{spam: 1, ham: "egg"}'
The code example is very close from implementation!!
deep_thought/utils.py
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 ̄\ _( ツ )_/  ̄
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doctest builder
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1. ...2. 3. extensions = [4. 'sphinx.ext.autodoc',5. 'sphinx.ext.doctest',6. ]7.
Line-5: add 'sphinx.ext.doctest' extension.
setup doctest extension
doc/conf.py
append
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$ make doctest...Document: api-------------********************************************************File "api.rst", line 11, in defaultFailed example: dumps(data)Expected: '{spam: 1, ham: "egg"}'Got: 'to-be-implemented'...make: *** [doctest] Error 1
Result of "make doctest"
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Result of doctest
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Listing APIs automatically
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Individual pages for each modules
api.html
calc.html
utils.html
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1. deep_thought.utils2. ===================3. .. automodule:: deep_thought.utils4. :members:
doc/deep_thought.utils.rst
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1. deep_thought.utils2. ===================3. .. automodule:: deep_thought.utils4. :members:
Add automodule directive to your doc
doc/deep_thought.utils.rst
1. deep_thought.calc2. ==================3. .. automodule:: deep_thought.calc4. :members:
1. deep_thought.api2. ==================3. .. automodule:: deep_thought.api4. :members:
doc/deep_thought.calc.rst
doc/deep_thought.api.rst
And many many reST files ... 46
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 ̄\ _( ツ )_/  ̄
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autosummary extension
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1. ...2. 3. extensions = [4. 'sphinx.ext.autodoc',5. 'sphinx.ext.doctest',6. 'sphinx.ext.autosummary',7. ]8. autodoc_default_flags = ['members']9. autosummary_generate = True10.
Line-9: autosummary_generate = True generates reST files what you will specify with using autosummary directive.
setup autosummary extension
doc/conf.py
append
appendappend
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1. Deep thought API2. ================3. 4. .. autosummary::5. :toctree: generated6. 7. deep_thought.api8. deep_thought.calc9. deep_thought.utils10.
Replace automodule with autosummary
doc/index.rst
$ make html...
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Output of autosummary
autosummary directive become TOC for each module pages.
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Discovering undocumented APIs
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1. def spam():2. ...3. return res4. 5. def ham():6. ...7. return res8. 9. def egg():10. ...11. return res
How to find undocumented funcs?
doc/nodoc.py
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coverage extension
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1. ...2. 3. extensions = [4. 'sphinx.ext.autodoc',5. 'sphinx.ext.doctest',6. 'sphinx.ext.autosummary',7. 'sphinx.ext.coverage',8. ]9. autodoc_default_flags = ['members']10.autosummary_generate = True
setup coverage extension
doc/conf.py
append
Line-7: add 'sphinx.ext.coverage' extension.
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make coverage and check the result
$ make coverage...Testing of coverage in the sources finished, look at the results in _build\coverage.
$ ls _build/coveragec.txt python.txt undoc.pickle
1. Undocumented Python objects2. ===========================3. deep_thought.utils4. ------------------5. Functions:6. * egg
_build/coverage/python.txt
This function doesn't have a doc!
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CAUTION!
1. Undocumented Python objects2. ===========================3. deep_thought.utils4. ------------------5. Functions:6. * egg
python.txt
$ make coverage...Testing of coverage in the sources finished, look at the results in _build\coverage.
$ ls _build/coveragec.txt python.txt undoc.pickle
The command always return ZERO
coverage.xml is not exist
reST format for whom?
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Let's make Pull-Request!
We are waiting for your contribution
to solve the problem.(bow)
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Wrap-up
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Why don't you write docstrings?
I don't know what/where should I write.Let's write a description, arguments and
doctest blocks at the next line of function signature.
Are there some docstring format spec?Yes, you can use "info field list" for argument
spec and you can use doctest block for code example.
It's not beneficial.You can use autodoc, autosummary,
doctest and coverage to make it beneficial.
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Options, Tips
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1. Options
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Options for autodoc
:members: blahTo document just specified members. Empty is ALL.
:undoc-members: ...To document members which doesn't have docstring.
:private-members: ...To document private members which name starts with
underscore.
:special-members: ...To document starts with underscore underscore.
:inherited-members: ...To document inherited from super class.
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2. Directives for Web API
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sphinxcontrib-httpdomain 3rd-party ext
http domain's get directive
render
page
render routing table (index)
http highlighter
It also contains sphinxcontrib.autohttp.flask, .bottle, .tornado extensions
Listing
New Index
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3. Document translation
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Translation into other languages
$ make gettext...Build finished. The message catalogs are in _build/gettext.
$ sphinx-intl update -p _build/gettext -l zh_tw
#: ../../../deep_thought/utils.pydocstring of deep_thought.utils.dumps:1msgid "Serialize ``obj`` to a JSON formatted :class:`str`."msgstr " 序列化 ``obj`` 要 JSON 格式 :class:`str`."
msgid "For example:"msgstr " 例如 :"
locale/zh_tw/LC_MESSAGES/generated.po
language = 'zh_tw'locale_dirs = ['locale']
conf.py
$ make html...Build finished. The HTML pages are in _build/html. 67
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Questions?@shimizukawa
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Thanks :)
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