我目前正在使用Sphinx和autodoc插件为我的python包编写文档。
对于函数返回值,我可以例如写lapply(1:9, function(x) 2*x + -1:0)
告诉sphinx有一个类型为int的返回值,名为count。
我现在有一个函数可以让我的数据库中的项目的前辈:
:returns: int: count
如您所见,它会提取原始项目,并返回类def get_previous_release(release_id):
""" Holt Vorgängeritem eines Items mit der ID release_id
:param release_id: ID des items für das Release
:type release_id: int
"""
if not isinstance(release_id, int):
raise ValueError('get_previous_release expects an Integer value for the parameter release_id')
try:
release = my_queries.core.get_by_id(release_id)
except IndexError:
raise LookupError('The item with id {} could no be found'.format(release_id))
if 'Alpha-Release' in release.name:
release = AlphaRelease(release.key, release.name, release.state)
elif 'Beta-Release' in release.name:
release = BetaRelease(release.key, release.name, release.state)
elif '-Release' in release.name:
release = VRelease(release.key, release.name, release.state)
else:
raise TypeError('The item with the id {} does not contain \'-Release\' in the Summary ' + \
'and is therefore not considered a Release')
previous_release = release.get_predecessor()
if not previous_release:
raise LookupError('Could not find a predecessor for item with id {}'.format(release_id))
return previous_release
,AlphaRelease
或BetaRelease
的实例,具体取决于字段VRelease
的内容这些物品。
在docstring中定义具有各种可能类型的返回值的最佳做法是什么?
答案 0 :(得分:8)
returns, return: Description of the return value.
rtype: Return type. Creates a link if possible.
您可能也会受益于:
raises, raise, except, exception: That (and when) a specific exception is raised.
所以,举个例子:
def get_previous_release(release_id):
"""
Holt Vorgängeritem eines Items mit der ID release_id
:param release_id: ID des items für das Release
:type release_id: int
:returns: appropriate release object
:rtype: AlphaRelease, BetaRelease, or VRelease
:raises ValueError: if release_id not an int
:raises LookupError: if given release_id not found
:raises TypeError: if id doesn't reference release
"""
... # your code here
不幸的是,对于多种返回类型,Sphinx语法和词汇表中没有严格或规范的选择。如果存在一个类型(例如GenericRelease
),通常会指出可能返回的所有类型的超类型。但Python现在正处于Python 3中后期,它定义了一种更丰富的符号。 typing module为这些类型定义了一种不断发展的新语法,与旧的Sphinx定义无关。如果您希望使用这一新兴标准,您可以尝试以下方式:
:rtype: Union[AlphaRelease, BetaRelease, VRelease]