Code Example#
About the example
Below you see the rendered version of the example module
super_repo\example_google.py
Example Google style docstrings.
This module demonstrates documentation as specified by the Google Python
Style Guide
_. Docstrings may extend over multiple lines. Sections are created
with a section header and a colon followed by a block of indented text.
Examples:
Examples can be given using either the Example
or Examples
sections. Sections support any reStructuredText formatting, including
literal blocks::
$ python example_google.py
Section breaks are created by resuming unindented text. Section breaks are also implicitly created anytime a new section starts.
Attributes:
Name | Type | Description |
---|---|---|
module_level_variable1 |
int |
Module level variables may be documented in
either the Either form is acceptable, but the two should not be mixed. Choose one convention to document module level variables and be consistent with it. |
Todo
- For module TODOs
- You have to also use
sphinx.ext.todo
extension
.. _Google Python Style Guide: http://google.github.io/styleguide/pyguide.html
module_level_variable2
#
int: Module level variable documented inline.
The docstring may span multiple lines. The type may optionally be specified on the first line, separated by a colon.
ExampleClass
#
The summary line for a class docstring should fit on one line.
If the class has public attributes, they may be documented here
in an Attributes
section and follow the same formatting as a
function's Args
section. Alternatively, attributes may be documented
inline with the attribute's declaration (see init method below).
Properties created with the @property
decorator should be documented
in the property's getter method.
Attributes:
Name | Type | Description |
---|---|---|
attr1 |
str |
Description of |
attr2 |
obj: |
Source code in super_repo\example_google.py
class ExampleClass(object):
"""The summary line for a class docstring should fit on one line.
If the class has public attributes, they may be documented here
in an ``Attributes`` section and follow the same formatting as a
function's ``Args`` section. Alternatively, attributes may be documented
inline with the attribute's declaration (see __init__ method below).
Properties created with the ``@property`` decorator should be documented
in the property's getter method.
Attributes:
attr1 (str): Description of `attr1`.
attr2 (:obj:`int`, optional): Description of `attr2`.
"""
def __init__(self, param1, param2, param3):
"""Example of docstring on the __init__ method.
The __init__ method may be documented in either the class level
docstring, or as a docstring on the __init__ method itself.
Either form is acceptable, but the two should not be mixed. Choose one
convention to document the __init__ method and be consistent with it.
Note:
Do not include the `self` parameter in the ``Args`` section.
Args:
param1 (str): Description of `param1`.
param2 (:obj:`int`, optional): Description of `param2`. Multiple
lines are supported.
param3 (:obj:`list` of :obj:`str`): Description of `param3`.
"""
self.attr1 = param1
self.attr2 = param2
self.attr3 = param3 #: Doc comment *inline* with attribute
#: list of str: Doc comment *before* attribute, with type specified
self.attr4 = ['attr4']
self.attr5 = None
"""str: Docstring *after* attribute, with type specified."""
@property
def readonly_property(self):
"""str: Properties should be documented in their getter method."""
return 'readonly_property'
@property
def readwrite_property(self):
""":obj:`list` of :obj:`str`: Properties with both a getter and setter
should only be documented in their getter method.
If the setter method contains notable behavior, it should be
mentioned here.
"""
return ['readwrite_property']
@readwrite_property.setter
def readwrite_property(self, value):
value
def example_method(self, param1, param2):
"""Class methods are similar to regular functions.
Note:
Do not include the `self` parameter in the ``Args`` section.
Args:
param1: The first parameter.
param2: The second parameter.
Returns:
True if successful, False otherwise.
"""
return True
def __special__(self):
"""By default special members with docstrings are not included.
Special members are any methods or attributes that start with and
end with a double underscore. Any special member with a docstring
will be included in the output, if
``napoleon_include_special_with_doc`` is set to True.
This behavior can be enabled by changing the following setting in
Sphinx's conf.py::
napoleon_include_special_with_doc = True
"""
pass
def __special_without_docstring__(self):
pass
def _private(self):
"""By default private members are not included.
Private members are any methods or attributes that start with an
underscore and are *not* special. By default they are not included
in the output.
This behavior can be changed such that private members *are* included
by changing the following setting in Sphinx's conf.py::
napoleon_include_private_with_doc = True
"""
pass
def _private_without_docstring(self):
pass
readonly_property
property
readonly
#
str: Properties should be documented in their getter method.
readwrite_property
property
writable
#
:obj:list
of :obj:str
: Properties with both a getter and setter
should only be documented in their getter method.
If the setter method contains notable behavior, it should be mentioned here.
__init__(self, param1, param2, param3)
special
#
Example of docstring on the init method.
The init method may be documented in either the class level docstring, or as a docstring on the init method itself.
Either form is acceptable, but the two should not be mixed. Choose one convention to document the init method and be consistent with it.
Note
Do not include the self
parameter in the Args
section.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
param1 |
str |
Description of |
required |
param2 |
obj: |
required | |
param3 |
obj: |
required |
Source code in super_repo\example_google.py
def __init__(self, param1, param2, param3):
"""Example of docstring on the __init__ method.
The __init__ method may be documented in either the class level
docstring, or as a docstring on the __init__ method itself.
Either form is acceptable, but the two should not be mixed. Choose one
convention to document the __init__ method and be consistent with it.
Note:
Do not include the `self` parameter in the ``Args`` section.
Args:
param1 (str): Description of `param1`.
param2 (:obj:`int`, optional): Description of `param2`. Multiple
lines are supported.
param3 (:obj:`list` of :obj:`str`): Description of `param3`.
"""
self.attr1 = param1
self.attr2 = param2
self.attr3 = param3 #: Doc comment *inline* with attribute
#: list of str: Doc comment *before* attribute, with type specified
self.attr4 = ['attr4']
self.attr5 = None
"""str: Docstring *after* attribute, with type specified."""
__special__(self)
special
#
By default special members with docstrings are not included.
Special members are any methods or attributes that start with and
end with a double underscore. Any special member with a docstring
will be included in the output, if
napoleon_include_special_with_doc
is set to True.
This behavior can be enabled by changing the following setting in Sphinx's conf.py::
napoleon_include_special_with_doc = True
Source code in super_repo\example_google.py
def __special__(self):
"""By default special members with docstrings are not included.
Special members are any methods or attributes that start with and
end with a double underscore. Any special member with a docstring
will be included in the output, if
``napoleon_include_special_with_doc`` is set to True.
This behavior can be enabled by changing the following setting in
Sphinx's conf.py::
napoleon_include_special_with_doc = True
"""
pass
example_method(self, param1, param2)
#
Class methods are similar to regular functions.
Note
Do not include the self
parameter in the Args
section.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
param1 |
The first parameter. |
required | |
param2 |
The second parameter. |
required |
Returns:
Type | Description |
---|---|
True if successful, False otherwise. |
Source code in super_repo\example_google.py
def example_method(self, param1, param2):
"""Class methods are similar to regular functions.
Note:
Do not include the `self` parameter in the ``Args`` section.
Args:
param1: The first parameter.
param2: The second parameter.
Returns:
True if successful, False otherwise.
"""
return True
ExampleError (Exception)
#
Exceptions are documented in the same way as classes.
The init method may be documented in either the class level docstring, or as a docstring on the init method itself.
Either form is acceptable, but the two should not be mixed. Choose one convention to document the init method and be consistent with it.
Note
Do not include the self
parameter in the Args
section.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
msg |
str |
Human readable string describing the exception. |
required |
code |
obj: |
required |
Attributes:
Name | Type | Description |
---|---|---|
msg |
str |
Human readable string describing the exception. |
code |
int |
Exception error code. |
Source code in super_repo\example_google.py
class ExampleError(Exception):
"""Exceptions are documented in the same way as classes.
The __init__ method may be documented in either the class level
docstring, or as a docstring on the __init__ method itself.
Either form is acceptable, but the two should not be mixed. Choose one
convention to document the __init__ method and be consistent with it.
Note:
Do not include the `self` parameter in the ``Args`` section.
Args:
msg (str): Human readable string describing the exception.
code (:obj:`int`, optional): Error code.
Attributes:
msg (str): Human readable string describing the exception.
code (int): Exception error code.
"""
def __init__(self, msg, code):
self.msg = msg
self.code = code
example_generator(n)
#
Generators have a Yields
section instead of a Returns
section.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
n |
int |
The upper limit of the range to generate, from 0 to |
required |
Yields:
Type | Description |
---|---|
int |
The next number in the range of 0 to |
Examples:
Examples should be written in doctest format, and should illustrate how to use the function.
>>> print([i for i in example_generator(4)])
[0, 1, 2, 3]
Source code in super_repo\example_google.py
def example_generator(n):
"""Generators have a ``Yields`` section instead of a ``Returns`` section.
Args:
n (int): The upper limit of the range to generate, from 0 to `n` - 1.
Yields:
int: The next number in the range of 0 to `n` - 1.
Examples:
Examples should be written in doctest format, and should illustrate how
to use the function.
>>> print([i for i in example_generator(4)])
[0, 1, 2, 3]
"""
for i in range(n):
yield i
function_with_pep484_type_annotations(param1, param2)
#
Example function with PEP 484 type annotations.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
param1 |
int |
The first parameter. |
required |
param2 |
str |
The second parameter. |
required |
Returns:
Type | Description |
---|---|
bool |
The return value. True for success, False otherwise. |
Source code in super_repo\example_google.py
def function_with_pep484_type_annotations(param1: int, param2: str) -> bool:
"""Example function with PEP 484 type annotations.
Args:
param1: The first parameter.
param2: The second parameter.
Returns:
The return value. True for success, False otherwise.
"""
function_with_types_in_docstring(param1, param2)
#
Example function with types documented in the docstring.
PEP 484
type annotations are supported. If attribute, parameter, and
return types are annotated according to PEP 484
, they do not need to be
included in the docstring:
Parameters:
Name | Type | Description | Default |
---|---|---|---|
param1 |
int |
The first parameter. |
required |
param2 |
str |
The second parameter. |
required |
Returns:
Type | Description |
---|---|
bool |
The return value. True for success, False otherwise. |
.. _PEP 484: https://www.python.org/dev/peps/pep-0484/
Source code in super_repo\example_google.py
def function_with_types_in_docstring(param1, param2):
"""Example function with types documented in the docstring.
`PEP 484`_ type annotations are supported. If attribute, parameter, and
return types are annotated according to `PEP 484`_, they do not need to be
included in the docstring:
Args:
param1 (int): The first parameter.
param2 (str): The second parameter.
Returns:
bool: The return value. True for success, False otherwise.
.. _PEP 484:
https://www.python.org/dev/peps/pep-0484/
"""
module_level_function(param1, param2=None, *args, **kwargs)
#
This is an example of a module level function.
Function parameters should be documented in the Args
section. The name
of each parameter is required. The type and description of each parameter
is optional, but should be included if not obvious.
If *args or **kwargs are accepted,
they should be listed as *args
and **kwargs
.
The format for a parameter is::
name (type): description
The description may span multiple lines. Following
lines should be indented. The "(type)" is optional.
Multiple paragraphs are supported in parameter
descriptions.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
param1 |
int |
The first parameter. |
required |
param2 |
obj: |
None |
|
*args |
Variable length argument list. |
() |
|
**kwargs |
Arbitrary keyword arguments. |
{} |
Returns:
Type | Description |
---|---|
bool |
True if successful, False otherwise. The return type is optional and may be specified at the beginning of
the The The
|
Exceptions:
Type | Description |
---|---|
AttributeError |
The |
ValueError |
If |
Source code in super_repo\example_google.py
def module_level_function(param1, param2=None, *args, **kwargs):
"""This is an example of a module level function.
Function parameters should be documented in the ``Args`` section. The name
of each parameter is required. The type and description of each parameter
is optional, but should be included if not obvious.
If \*args or \*\*kwargs are accepted,
they should be listed as ``*args`` and ``**kwargs``.
The format for a parameter is::
name (type): description
The description may span multiple lines. Following
lines should be indented. The "(type)" is optional.
Multiple paragraphs are supported in parameter
descriptions.
Args:
param1 (int): The first parameter.
param2 (:obj:`str`, optional): The second parameter. Defaults to None.
Second line of description should be indented.
*args: Variable length argument list.
**kwargs: Arbitrary keyword arguments.
Returns:
bool: True if successful, False otherwise.
The return type is optional and may be specified at the beginning of
the ``Returns`` section followed by a colon.
The ``Returns`` section may span multiple lines and paragraphs.
Following lines should be indented to match the first line.
The ``Returns`` section supports any reStructuredText formatting,
including literal blocks::
{
'param1': param1,
'param2': param2
}
Raises:
AttributeError: The ``Raises`` section is a list of all exceptions
that are relevant to the interface.
ValueError: If `param2` is equal to `param1`.
"""
if param1 == param2:
raise ValueError('param1 may not be equal to param2')
return True