Replace `a and b or c` by the more legible `b if a or c`.

21 files changed, 45 insertions, 48 deletions

diff --git a/sphinx/application.py b/sphinx/application.py
index a98e3a6a2..2284d6912 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -355,8 +355,8 @@ class Sphinx:
             if self._warncount and self.keep_going:
                 self.statuscode = 1
 
-            status = (self.statuscode == 0 and
-                      __('succeeded') or __('finished with problems'))
+            status = (__('succeeded') if self.statuscode == 0
+                      else __('finished with problems'))
             if self._warncount:
                 if self.warningiserror:
                     msg = __('build %s, %s warning (with warnings treated as errors).',
@@ -511,7 +511,7 @@ class Sphinx:
         logger.debug('[app] adding config value: %r',
                      (name, default, rebuild) + ((types,) if types else ()))  # type: ignore
         if rebuild in (False, True):
-            rebuild = rebuild and 'env' or ''
+            rebuild = 'env' if rebuild else ''
         self.config.add(name, default, rebuild, types)
 
     def add_event(self, name):
diff --git a/sphinx/builders/html.py b/sphinx/builders/html.py
index a0662dc82..20502f467 100644
--- a/sphinx/builders/html.py
+++ b/sphinx/builders/html.py
@@ -461,11 +461,8 @@ class StandaloneHTMLBuilder(Builder):
         else:
             self.last_updated = None
 
-        logo = self.config.html_logo and \
-            path.basename(self.config.html_logo) or ''
-
-        favicon = self.config.html_favicon and \
-            path.basename(self.config.html_favicon) or ''
+        logo = path.basename(self.config.html_logo) if self.config.html_logo else ''
+        favicon = path.basename(self.config.html_favicon) if self.config.html_favicon else ''
 
         if not isinstance(self.config.html_use_opensearch, str):
             logger.warning(__('html_use_opensearch config value must now be a string'))
@@ -567,7 +564,7 @@ class StandaloneHTMLBuilder(Builder):
 
         # title rendered as HTML
         title_node = self.env.longtitles.get(docname)
-        title = title_node and self.render_partial(title_node)['title'] or ''
+        title = self.render_partial(title_node)['title'] if title_node else ''
 
         # Suffix for the document
         source_suffix = path.splitext(self.env.doc2path(docname))[1]
@@ -624,7 +621,7 @@ class StandaloneHTMLBuilder(Builder):
         self.imgpath = relative_uri(self.get_target_uri(docname), self.imagedir)
         self.post_process_images(doctree)
         title_node = self.env.longtitles.get(docname)
-        title = title_node and self.render_partial(title_node)['title'] or ''
+        title = self.render_partial(title_node)['title'] if title_node else ''
         self.index_page(docname, doctree, title)
 
     def finish(self) -> None:
diff --git a/sphinx/builders/latex/__init__.py b/sphinx/builders/latex/__init__.py
index de4223a0e..926e44a03 100644
--- a/sphinx/builders/latex/__init__.py
+++ b/sphinx/builders/latex/__init__.py
@@ -243,7 +243,7 @@ class LaTeXBuilder(Builder):
 
                 doctree = self.assemble_doctree(
                     docname, toctree_only,
-                    appendices=((docclass != 'howto') and self.config.latex_appendices or []))
+                    appendices=(self.config.latex_appendices if docclass != 'howto' else []))
                 doctree['tocdepth'] = tocdepth
                 self.post_process_images(doctree)
                 self.update_doc_context(title, author)
diff --git a/sphinx/cmd/quickstart.py b/sphinx/cmd/quickstart.py
index 846750a68..95301897f 100644
--- a/sphinx/cmd/quickstart.py
+++ b/sphinx/cmd/quickstart.py
@@ -366,7 +366,7 @@ def generate(d: Dict, overwrite: bool = True, silent: bool = False, templatedir:
 
     ensuredir(d['path'])
 
-    srcdir = d['sep'] and path.join(d['path'], 'source') or d['path']
+    srcdir = path.join(d['path'], 'source') if d['sep'] else d['path']
 
     ensuredir(srcdir)
     if d['sep']:
@@ -412,15 +412,15 @@ def generate(d: Dict, overwrite: bool = True, silent: bool = False, templatedir:
         batchfile_template = 'quickstart/make.bat_t'
 
     if d['makefile'] is True:
-        d['rsrcdir'] = d['sep'] and 'source' or '.'
-        d['rbuilddir'] = d['sep'] and 'build' or d['dot'] + 'build'
+        d['rsrcdir'] = 'source' if d['sep'] else '.'
+        d['rbuilddir'] = 'build' if d['sep'] else d['dot'] + 'build'
         # use binary mode, to avoid writing \r\n on Windows
         write_file(path.join(d['path'], 'Makefile'),
                    template.render(makefile_template, d), '\n')
 
     if d['batchfile'] is True:
-        d['rsrcdir'] = d['sep'] and 'source' or '.'
-        d['rbuilddir'] = d['sep'] and 'build' or d['dot'] + 'build'
+        d['rsrcdir'] = 'source' if d['sep'] else '.'
+        d['rbuilddir'] = 'build' if d['sep'] else d['dot'] + 'build'
         write_file(path.join(d['path'], 'make.bat'),
                    template.render(batchfile_template, d), '\r\n')
 
diff --git a/sphinx/directives/other.py b/sphinx/directives/other.py
index 1113e8241..a5a2831d6 100644
--- a/sphinx/directives/other.py
+++ b/sphinx/directives/other.py
@@ -300,7 +300,7 @@ class HList(SphinxDirective):
         index = 0
         newnode = addnodes.hlist()
         for column in range(ncolumns):
-            endindex = index + (column < nmore and (npercol + 1) or npercol)
+            endindex = index + ((npercol + 1) if column < nmore else npercol)
             bullet_list = nodes.bullet_list()
             bullet_list += fulllist.children[index:endindex]
             newnode += addnodes.hlistcol('', bullet_list)
diff --git a/sphinx/domains/javascript.py b/sphinx/domains/javascript.py
index 121d5582d..da695065b 100644
--- a/sphinx/domains/javascript.py
+++ b/sphinx/domains/javascript.py
@@ -105,7 +105,7 @@ class JSObject(ObjectDescription):
     def add_target_and_index(self, name_obj: Tuple[str, str], sig: str,
                              signode: desc_signature) -> None:
         mod_name = self.env.ref_context.get('js:module')
-        fullname = (mod_name and mod_name + '.' or '') + name_obj[0]
+        fullname = (mod_name + '.' if mod_name else '') + name_obj[0]
         if fullname not in self.state.document.ids:
             signode['names'].append(fullname)
             signode['ids'].append(fullname.replace('$', '_S_'))
@@ -385,7 +385,7 @@ class JavaScriptDomain(Domain):
                      ) -> Element:
         mod_name = node.get('js:module')
         prefix = node.get('js:object')
-        searchorder = node.hasattr('refspecific') and 1 or 0
+        searchorder = 1 if node.hasattr('refspecific') else 0
         name, obj = self.find_obj(env, mod_name, prefix, target, typ, searchorder)
         if not obj:
             return None
diff --git a/sphinx/domains/python.py b/sphinx/domains/python.py
index a2ed21f66..4374e0a71 100644
--- a/sphinx/domains/python.py
+++ b/sphinx/domains/python.py
@@ -315,7 +315,7 @@ class PyObject(ObjectDescription):
     def add_target_and_index(self, name_cls: Tuple[str, str], sig: str,
                              signode: desc_signature) -> None:
         modname = self.options.get('module', self.env.ref_context.get('py:module'))
-        fullname = (modname and modname + '.' or '') + name_cls[0]
+        fullname = (modname + '.' if modname else '') + name_cls[0]
         # note target
         if fullname not in self.state.document.ids:
             signode['names'].append(fullname)
@@ -830,7 +830,7 @@ class PythonModuleIndex(Index):
                 num_toplevels += 1
                 subtype = 0
 
-            qualifier = deprecated and _('Deprecated') or ''
+            qualifier = _('Deprecated') if deprecated else ''
             entries.append(IndexEntry(stripped + modname, subtype, docname,
                                       'module-' + stripped + modname, platforms,
                                       qualifier, synopsis))
@@ -1008,7 +1008,7 @@ class PythonDomain(Domain):
                      ) -> Element:
         modname = node.get('py:module')
         clsname = node.get('py:class')
-        searchmode = node.hasattr('refspecific') and 1 or 0
+        searchmode = 1 if node.hasattr('refspecific') else 0
         matches = self.find_obj(env, modname, clsname, target,
                                 type, searchmode)
         if not matches:
diff --git a/sphinx/environment/adapters/toctree.py b/sphinx/environment/adapters/toctree.py
index d5f827dde..0975b33cd 100644
--- a/sphinx/environment/adapters/toctree.py
+++ b/sphinx/environment/adapters/toctree.py
@@ -252,7 +252,7 @@ class TocTree:
 
         # prune the tree to maxdepth, also set toc depth and current classes
         _toctree_add_classes(newnode, 1)
-        self._toctree_prune(newnode, 1, prune and maxdepth or 0, collapse)
+        self._toctree_prune(newnode, 1, maxdepth if prune else 0, collapse)
 
         if isinstance(newnode[-1], nodes.Element) and len(newnode[-1]) == 0:  # No titles found
             return None
diff --git a/sphinx/ext/autodoc/__init__.py b/sphinx/ext/autodoc/__init__.py
index d8e93727b..c053b5b75 100644
--- a/sphinx/ext/autodoc/__init__.py
+++ b/sphinx/ext/autodoc/__init__.py
@@ -295,7 +295,7 @@ class Documenter:
         # support explicit module and class name separation via ::
         if explicit_modname is not None:
             modname = explicit_modname[:-2]
-            parents = path and path.rstrip('.').split('.') or []
+            parents = path.rstrip('.').split('.') if path else []
         else:
             modname = None
             parents = []
@@ -308,7 +308,7 @@ class Documenter:
         self.args = args
         self.retann = retann
         self.fullname = (self.modname or '') + \
-                        (self.objpath and '.' + '.'.join(self.objpath) or '')
+                        ('.' + '.'.join(self.objpath) if self.objpath else '')
         return True
 
     def import_object(self) -> bool:
@@ -399,7 +399,7 @@ class Documenter:
             args, retann = result
 
         if args is not None:
-            return args + (retann and (' -> %s' % retann) or '')
+            return args + ((' -> %s' % retann) if retann else '')
         else:
             return ''
 
@@ -1103,9 +1103,9 @@ class ClassDocumenter(DocstringSignatureMixin, ModuleLevelDocumenter):  # type:
             sourcename = self.get_sourcename()
             self.add_line('', sourcename)
             if hasattr(self.object, '__bases__') and len(self.object.__bases__):
-                bases = [b.__module__ in ('__builtin__', 'builtins') and
-                         ':class:`%s`' % b.__name__ or
-                         ':class:`%s.%s`' % (b.__module__, b.__name__)
+                bases = [':class:`%s`' % b.__name__
+                         if b.__module__ in ('__builtin__', 'builtins')
+                         else ':class:`%s.%s`' % (b.__module__, b.__name__)
                          for b in self.object.__bases__]
                 self.add_line('   ' + _('Bases: %s') % ', '.join(bases),
                               sourcename)
diff --git a/sphinx/ext/autosummary/__init__.py b/sphinx/ext/autosummary/__init__.py
index de8c18baf..4530a4eff 100644
--- a/sphinx/ext/autosummary/__init__.py
+++ b/sphinx/ext/autosummary/__init__.py
@@ -722,7 +722,7 @@ def process_generate_options(app: Sphinx) -> None:
                     if os.path.isfile(env.doc2path(x))]
     else:
         ext = list(app.config.source_suffix)
-        genfiles = [genfile + (not genfile.endswith(tuple(ext)) and ext[0] or '')
+        genfiles = [genfile + (ext[0] if not genfile.endswith(tuple(ext)) else '')
                     for genfile in genfiles]
 
         for entry in genfiles[:]:
diff --git a/sphinx/ext/doctest.py b/sphinx/ext/doctest.py
index 996f8394f..1c356ff6d 100644
--- a/sphinx/ext/doctest.py
+++ b/sphinx/ext/doctest.py
@@ -326,7 +326,7 @@ class DocTestBuilder(Builder):
     def finish(self) -> None:
         # write executive summary
         def s(v: int) -> str:
-            return v != 1 and 's' or ''
+            return 's' if v != 1 else ''
         repl = (self.total_tries, s(self.total_tries),
                 self.total_failures, s(self.total_failures),
                 self.setup_failures, s(self.setup_failures),
@@ -523,8 +523,8 @@ Doctest summary
                 self.type = 'single'  # as for ordinary doctests
             else:
                 # testcode and output separate
-                output = code[1] and code[1].code or ''
-                options = code[1] and code[1].options or {}
+                output = code[1].code if code[1] else ''
+                options = code[1].options if code[1] else {}
                 # disable <BLANKLINE> processing as it is not needed
                 options[doctest.DONT_ACCEPT_BLANKLINE] = True
                 # find out if we're testing an exception
diff --git a/sphinx/ext/intersphinx.py b/sphinx/ext/intersphinx.py
index 7745d43d4..a403698f2 100644
--- a/sphinx/ext/intersphinx.py
+++ b/sphinx/ext/intersphinx.py
@@ -176,7 +176,7 @@ def fetch_inventory(app: Sphinx, uri: str, inv: Any) -> Any:
                     uri = path.dirname(newinv)
         with f:
             try:
-                join = localuri and path.join or posixpath.join
+                join = path.join if localuri else posixpath.join
                 invdata = InventoryFile.load(f, uri, join)
             except ValueError as exc:
                 raise ValueError('unknown or unsupported inventory version: %r' % exc)
@@ -401,7 +401,7 @@ def inspect_main(argv: List[str]) -> None:
             print(key)
             for entry, einfo in sorted(invdata[key].items()):
                 print('\t%-40s %s%s' % (entry,
-                                        einfo[3] != '-' and '%-40s: ' % einfo[3] or '',
+                                        '%-40s: ' % einfo[3] if einfo[3] != '-' else '',
                                         einfo[2]))
     except ValueError as exc:
         print(exc.args[0] % exc.args[1:])
diff --git a/sphinx/ext/napoleon/docstring.py b/sphinx/ext/napoleon/docstring.py
index 5610815bd..bb77aa22d 100644
--- a/sphinx/ext/napoleon/docstring.py
+++ b/sphinx/ext/napoleon/docstring.py
@@ -112,7 +112,7 @@ class GoogleDocstring:
 
         if not self._config:
             from sphinx.ext.napoleon import Config
-            self._config = self._app and self._app.config or Config()  # type: ignore
+            self._config = self._app.config if self._app else Config()  # type: ignore
 
         if not what:
             if inspect.isclass(obj):
@@ -385,7 +385,7 @@ class GoogleDocstring:
     def _format_field(self, _name: str, _type: str, _desc: List[str]) -> List[str]:
         _desc = self._strip_empty(_desc)
         has_desc = any(_desc)
-        separator = has_desc and ' -- ' or ''
+        separator = ' -- ' if has_desc else ''
         if _name:
             if _type:
                 if '`' in _type:
diff --git a/sphinx/jinja2glue.py b/sphinx/jinja2glue.py
index f767bd7f7..1a356c021 100644
--- a/sphinx/jinja2glue.py
+++ b/sphinx/jinja2glue.py
@@ -188,7 +188,7 @@ class BuiltinTemplateLoader(TemplateBridge, BaseLoader):
         self.loaders = [SphinxFileSystemLoader(x) for x in loaderchain]
 
         use_i18n = builder.app.translator is not None
-        extensions = use_i18n and ['jinja2.ext.i18n'] or []
+        extensions = ['jinja2.ext.i18n'] if use_i18n else []
         self.environment = SandboxedEnvironment(loader=self,
                                                 extensions=extensions)
         self.environment.filters['tobool'] = _tobool
diff --git a/sphinx/transforms/__init__.py b/sphinx/transforms/__init__.py
index 3d72b88df..b6119d8da 100644
--- a/sphinx/transforms/__init__.py
+++ b/sphinx/transforms/__init__.py
@@ -296,7 +296,7 @@ class FilterSystemMessages(SphinxTransform):
     default_priority = 999
 
     def apply(self, **kwargs) -> None:
-        filterlevel = self.config.keep_warnings and 2 or 5
+        filterlevel = 2 if self.config.keep_warnings else 5
         for node in self.document.traverse(nodes.system_message):
             if node['level'] < filterlevel:
                 logger.debug('%s [filtered system message]', node.astext())
diff --git a/sphinx/transforms/post_transforms/__init__.py b/sphinx/transforms/post_transforms/__init__.py
index 090ff0084..9cb7add44 100644
--- a/sphinx/transforms/post_transforms/__init__.py
+++ b/sphinx/transforms/post_transforms/__init__.py
@@ -155,7 +155,7 @@ class ReferencesResolver(SphinxPostTransform):
         if self.config.nitpicky:
             warn = True
             if self.config.nitpick_ignore:
-                dtype = domain and '%s:%s' % (domain.name, typ) or typ
+                dtype = '%s:%s' % (domain.name, typ) if domain else typ
                 if (dtype, target) in self.config.nitpick_ignore:
                     warn = False
                 # for "std" types also try without domain name
diff --git a/sphinx/util/jsdump.py b/sphinx/util/jsdump.py
index bfdba170b..2be48a34a 100644
--- a/sphinx/util/jsdump.py
+++ b/sphinx/util/jsdump.py
@@ -83,7 +83,7 @@ def dumps(obj: Any, key: bool = False) -> str:
     if obj is None:
         return 'null'
     elif obj is True or obj is False:
-        return obj and 'true' or 'false'
+        return 'true' if obj else 'false'
     elif isinstance(obj, (int, float)):
         return str(obj)
     elif isinstance(obj, dict):
diff --git a/sphinx/writers/html.py b/sphinx/writers/html.py
index 11a9bbbc4..50816bcf6 100644
--- a/sphinx/writers/html.py
+++ b/sphinx/writers/html.py
@@ -90,7 +90,7 @@ class HTMLTranslator(SphinxTranslator, BaseTranslator):
         self.permalink_text = self.config.html_add_permalinks
         # support backwards-compatible setting to a bool
         if not isinstance(self.permalink_text, str):
-            self.permalink_text = self.permalink_text and '¶' or ''
+            self.permalink_text = '¶' if self.permalink_text else ''
         self.permalink_text = self.encode(self.permalink_text)
         self.secnumber_suffix = self.config.html_secnumber_suffix
         self.param_separator = ''
diff --git a/sphinx/writers/html5.py b/sphinx/writers/html5.py
index 5ace8572f..8eefab141 100644
--- a/sphinx/writers/html5.py
+++ b/sphinx/writers/html5.py
@@ -62,7 +62,7 @@ class HTML5Translator(SphinxTranslator, BaseTranslator):
         self.permalink_text = self.config.html_add_permalinks
         # support backwards-compatible setting to a bool
         if not isinstance(self.permalink_text, str):
-            self.permalink_text = self.permalink_text and '¶' or ''
+            self.permalink_text = '¶' if self.permalink_text else ''
         self.permalink_text = self.encode(self.permalink_text)
         self.secnumber_suffix = self.config.html_secnumber_suffix
         self.param_separator = ''
diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index a3c676791..c52c1caf6 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -699,7 +699,7 @@ class LaTeXTranslator(SphinxTranslator):
     def hypertarget(self, id: str, withdoc: bool = True, anchor: bool = True) -> str:
         if withdoc:
             id = self.curfilestack[-1] + ':' + id
-        return (anchor and '\\phantomsection' or '') + \
+        return ('\\phantomsection' if anchor else '') + \
             '\\label{%s}' % self.idescape(id)
 
     def hypertarget_to(self, node: Element, anchor: bool = False) -> str:
@@ -1525,7 +1525,7 @@ class LaTeXTranslator(SphinxTranslator):
             elif isinstance(node[0], nodes.image) and 'width' in node[0]:
                 length = self.latex_image_length(node[0]['width'])
             self.body.append('\\begin{wrapfigure}{%s}{%s}\n\\centering' %
-                             (node['align'] == 'right' and 'r' or 'l', length or '0pt'))
+                             ('r' if node['align'] == 'right' else 'l', length or '0pt'))
             self.context.append('\\end{wrapfigure}\n')
         elif self.in_minipage:
             self.body.append('\n\\begin{center}')
diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index 757519740..bb4c2e23c 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -242,7 +242,7 @@ class TexinfoTranslator(SphinxTranslator):
         title = self.settings.title  # type: str
         if not title:
             title_node = self.document.next_node(nodes.title)
-            title = (title_node and title_node.astext()) or '<untitled>'
+            title = title_node.astext() if title_node else '<untitled>'
         elements['title'] = self.escape_id(title) or '<untitled>'
         # filename
         if not elements['filename']:
@@ -292,7 +292,7 @@ class TexinfoTranslator(SphinxTranslator):
         # each section is also a node
         for section in self.document.traverse(nodes.section):
             title = cast(nodes.TextElement, section.next_node(nodes.Titular))
-            name = (title and title.astext()) or '<untitled>'
+            name = title.astext() if title else '<untitled>'
             section['node_name'] = add_node_name(name)
 
     def collect_node_menus(self) -> None:
@@ -306,7 +306,7 @@ class TexinfoTranslator(SphinxTranslator):
             node_menus[node['node_name']] = entries
         # try to find a suitable "Top" node
         title = self.document.next_node(nodes.title)
-        top = (title and title.parent) or self.document
+        top = title.parent if title else self.document
         if not isinstance(top, (nodes.document, nodes.section)):
             top = self.document
         if top is not self.document: