autodoc: minor PEP8 adjustments

sphinx/ext/autodoc.py

@@ -50,11 +50,13 @@ class DefDict(dict):
     def __init__(self, default):
         dict.__init__(self)
         self.default = default
+
     def __getitem__(self, key):
         try:
             return dict.__getitem__(self, key)
         except KeyError:
             return self.default
+
     def __bool__(self):
         # docutils check "if option_spec"
         return True
@@ -92,6 +94,7 @@ class _MockModule(object):
         else:
             return _MockModule()
 
+
 def mock_import(modname):
     if '.' in modname:
         pkg, _n, mods = modname.rpartition('.')
@@ -104,12 +107,14 @@ def mock_import(modname):
 ALL = object()
 INSTANCEATTR = object()
 
+
 def members_option(arg):
     """Used to convert the :members: option to auto directives."""
     if arg is None:
         return ALL
     return [x.strip() for x in arg.split(',')]
 
+
 def members_set_option(arg):
     """Used to convert the :members: option to auto directives."""
     if arg is None:
@@ -118,6 +123,7 @@ def members_set_option(arg):
 
 SUPPRESS = object()
 
+
 def annotation_option(arg):
     if arg is None:
         # suppress showing the representation of the object
@@ -125,6 +131,7 @@ def annotation_option(arg):
     else:
         return arg
 
+
 def bool_option(arg):
     """Used to convert flag options to auto directives.  (Instead of
     directives.flag(), which returns None).
@@ -201,6 +208,7 @@ def cut_lines(pre, post=0, what=None):
             lines.append('')
     return process
 
+
 def between(marker, what=None, keepempty=False, exclude=False):
     """Return a listener that either keeps, or if *exclude* is True excludes,
     lines between lines that match the *marker* regular expression.  If no line
@@ -211,6 +219,7 @@ def between(marker, what=None, keepempty=False, exclude=False):
     be processed.
     """
     marker_re = re.compile(marker)
+
     def process(app, what_, name, obj, options, lines):
         if what and what_ not in what:
             return
@@ -719,6 +728,7 @@ class Documenter(object):
         elif member_order == 'bysource' and self.analyzer:
             # sort by source order, by virtue of the module analyzer
             tagorder = self.analyzer.tagorder
+
             def keyfunc(entry):
                 fullname = entry[0].name.split('::')[1]
                 return tagorder.get(fullname, len(tagorder))
@@ -976,6 +986,7 @@ class DocstringSignatureMixin(object):
                 self.args, self.retann = result
         return Documenter.format_signature(self)
 
+
 class DocstringStripSignatureMixin(DocstringSignatureMixin):
     """
     Mixin for AttributeDocumenter to provide the