Eschew the extraneous elses

https://www.youtube.com/watch?v=JVVMMULwR4s&t=289

qutebrowser/browser/commands.py

@@ -479,7 +479,7 @@ class CommandDispatcher:
         # Catch common cases before e.g. cloning tab
         if not forward and not history.can_go_back():
             raise cmdutils.CommandError("At beginning of history.")
-        elif forward and not history.can_go_forward():
+        if forward and not history.can_go_forward():
             raise cmdutils.CommandError("At end of history.")
 
         if tab or bg or window:

qutebrowser/browser/downloads.py

@@ -1105,8 +1105,7 @@ class DownloadModel(QAbstractListModel):
             to_retry = [d for d in self if d.done and not d.successful]
             if not to_retry:
                 raise cmdutils.CommandError("No failed downloads!")
-            else:
-                download = to_retry[0]
+            download = to_retry[0]
         download.try_retry()
 
     def can_clear(self):

qutebrowser/browser/hints.py

@@ -956,10 +956,9 @@ class HintManager(QObject):
         if keystring is None:
             if self._context.to_follow is None:
                 raise cmdutils.CommandError("No hint to follow")
-            elif select:
+            if select:
                 raise cmdutils.CommandError("Can't use --select without hint.")
-            else:
-                keystring = self._context.to_follow
+            keystring = self._context.to_follow
         elif keystring not in self._context.labels:
             raise cmdutils.CommandError("No hint {}!".format(keystring))
 

qutebrowser/browser/network/pac.py

@@ -142,7 +142,8 @@ class PACResolver:
         config = [c.strip() for c in proxy_str.split(' ') if c]
         if not config:
             raise ParseProxyError("Empty proxy entry")
-        elif config[0] == "DIRECT":
+
+        if config[0] == "DIRECT":
             if len(config) != 1:
                 raise ParseProxyError("Invalid number of parameters for " +
                                       "DIRECT")

qutebrowser/browser/webkit/tabhistory.py

@@ -89,8 +89,7 @@ def serialize(items):
             if current_idx is not None:
                 raise ValueError("Multiple active items ({} and {}) "
                                  "found!".format(current_idx, i))
-            else:
-                current_idx = i
+            current_idx = i
 
     if items:
         if current_idx is None:

qutebrowser/commands/command.py

@@ -402,7 +402,8 @@ class Command:
         if isinstance(typ, tuple):
             raise TypeError("{}: Legacy tuple type annotation!".format(
                 self.name))
-        elif getattr(typ, '__origin__', None) is typing.Union or (
+
+        if getattr(typ, '__origin__', None) is typing.Union or (
                 # Older Python 3.5 patch versions
                 # pylint: disable=no-member,useless-suppression
                 hasattr(typing, 'UnionMeta') and

qutebrowser/components/misccommands.py

@@ -292,8 +292,7 @@ def debug_crash(typ: str = 'exception') -> None:
     if typ == 'segfault':
         os.kill(os.getpid(), signal.SIGSEGV)
         raise Exception("Segfault failed (wat.)")
-    else:
-        raise Exception("Forced crash")
+    raise Exception("Forced crash")
 
 
 @cmdutils.register(debug=True, maxsplit=0, no_cmd_split=True)

qutebrowser/config/configtypes.py

@@ -176,8 +176,7 @@ class BaseType:
                 (pytype == dict and value == {})):
             if not self.none_ok:
                 raise configexc.ValidationError(value, "may not be null!")
-            else:
-                return
+            return
 
         if (not isinstance(value, pytype) or
                 pytype is int and isinstance(value, bool)):
@@ -365,9 +364,9 @@ class String(BaseType):
 
         if minlen is not None and minlen < 1:
             raise ValueError("minlen ({}) needs to be >= 1!".format(minlen))
-        elif maxlen is not None and maxlen < 1:
+        if maxlen is not None and maxlen < 1:
             raise ValueError("maxlen ({}) needs to be >= 1!".format(maxlen))
-        elif maxlen is not None and minlen is not None and maxlen < minlen:
+        if maxlen is not None and minlen is not None and maxlen < minlen:
             raise ValueError("minlen ({}) needs to be <= maxlen ({})!".format(
                 minlen, maxlen))
         self.minlen = minlen
@@ -1271,8 +1270,7 @@ class Regex(BaseType):
                     str(w.message).startswith('bad escape')):
                 raise configexc.ValidationError(
                     pattern, "must be a valid regex - " + str(w.message))
-            else:
-                warnings.warn(w.message)
+            warnings.warn(w.message)
 
         return compiled
 
@@ -1803,7 +1801,7 @@ class ConfirmQuit(FlagList):
             raise configexc.ValidationError(
                 values, "List cannot contain never!")
         # Always can't be set with other options
-        elif 'always' in values and len(values) > 1:
+        if 'always' in values and len(values) > 1:
             raise configexc.ValidationError(
                 values, "List cannot contain always!")
 

qutebrowser/misc/ipc.py

@@ -207,8 +207,7 @@ class IPCServer(QObject):
         if not ok:
             if self._server.serverError() == QAbstractSocket.AddressInUseError:
                 raise AddressInUseError(self._server)
-            else:
-                raise ListenError(self._server)
+            raise ListenError(self._server)
         if not utils.is_windows:  # pragma: no cover
             # If we use setSocketOptions on Unix with Qt < 5.4, we get a
             # NameError while listening.
@@ -452,19 +451,17 @@ def send_to_running_instance(socketname, command, target_arg, *, socket=None):
         socket.waitForBytesWritten(WRITE_TIMEOUT)
         if socket.error() != QLocalSocket.UnknownSocketError:
             raise SocketError("writing to running instance", socket)
-        else:
-            socket.disconnectFromServer()
-            if socket.state() != QLocalSocket.UnconnectedState:
-                socket.waitForDisconnected(CONNECT_TIMEOUT)
-            return True
+        socket.disconnectFromServer()
+        if socket.state() != QLocalSocket.UnconnectedState:
+            socket.waitForDisconnected(CONNECT_TIMEOUT)
+        return True
     else:
         if socket.error() not in [QLocalSocket.ConnectionRefusedError,
                                   QLocalSocket.ServerNotFoundError]:
             raise SocketError("connecting to running instance", socket)
-        else:
-            log.ipc.debug("No existing instance present (error {})".format(
-                socket.error()))
-            return False
+        log.ipc.debug("No existing instance present (error {})".format(
+            socket.error()))
+        return False
 
 
 def display_error(exc, args):

qutebrowser/misc/sessions.py

@@ -136,8 +136,7 @@ class SessionManager(QObject):
             path = os.path.join(self._base_path, name + '.yml')
             if check_exists and not os.path.exists(path):
                 raise SessionNotFoundError(path)
-            else:
-                return path
+            return path
 
     def exists(self, name):
         """Check if a named session exists."""

qutebrowser/misc/sql.py

@@ -112,8 +112,7 @@ def raise_sqlite_error(msg, error):
 
     if error_code in environmental_errors or qtbug_70506:
         raise SqlEnvironmentError(msg, error)
-    else:
-        raise SqlBugError(msg, error)
+    raise SqlBugError(msg, error)
 
 
 def init(db_path):

qutebrowser/misc/utilcmds.py

@@ -243,9 +243,8 @@ def log_capacity(capacity: int) -> None:
     """
     if capacity < 0:
         raise cmdutils.CommandError("Can't set a negative log capacity!")
-    else:
-        assert log.ram_handler is not None
-        log.ram_handler.change_log_capacity(capacity)
+    assert log.ram_handler is not None
+    log.ram_handler.change_log_capacity(capacity)
 
 
 @cmdutils.register(debug=True)

qutebrowser/utils/objreg.py

@@ -304,6 +304,5 @@ def window_by_index(idx):
     """Get the Nth opened window object."""
     if not window_registry:
         raise NoWindow()
-    else:
-        key = sorted(window_registry)[idx]
-        return window_registry[key]
+    key = sorted(window_registry)[idx]
+    return window_registry[key]

qutebrowser/utils/qtutils.py

@@ -131,13 +131,11 @@ def check_overflow(arg: int, ctype: str, fatal: bool = True) -> int:
     if arg > maxval:
         if fatal:
             raise OverflowError(arg)
-        else:
-            return maxval
+        return maxval
     elif arg < minval:
         if fatal:
             raise OverflowError(arg)
-        else:
-            return minval
+        return minval
     else:
         return arg
 

qutebrowser/utils/urlmatch.py

@@ -205,7 +205,7 @@ class UrlPattern:
         if self._host.endswith('.*'):
             # Special case to have a nicer error
             raise ParseError("TLD wildcards are not implemented yet")
-        elif '*' in self._host:
+        if '*' in self._host:
             # Only * or *.foo is allowed as host.
             raise ParseError("Invalid host wildcard")
 

qutebrowser/utils/usertypes.py

@@ -200,9 +200,8 @@ class NeighborList(collections.abc.Sequence):
         """Reset the position to the default."""
         if self._default is _UNSET:
             raise ValueError("No default set!")
-        else:
-            self._idx = self._items.index(self._default)
-            return self.curitem()
+        self._idx = self._items.index(self._default)
+        return self.curitem()
 
 
 # The mode of a Question.

scripts/dev/check_coverage.py

@@ -235,11 +235,11 @@ def check(fileobj, perfect_files):
     """Main entry point which parses/checks coverage.xml if applicable."""
     if not utils.is_linux:
         raise Skipped("on non-Linux system.")
-    elif '-k' in sys.argv[1:]:
+    if '-k' in sys.argv[1:]:
         raise Skipped("because -k is given.")
-    elif '-m' in sys.argv[1:]:
+    if '-m' in sys.argv[1:]:
         raise Skipped("because -m is given.")
-    elif '--lf' in sys.argv[1:]:
+    if '--lf' in sys.argv[1:]:
         raise Skipped("because --lf is given.")
 
     perfect_src_files = [e[1] for e in perfect_files]

scripts/dev/src2asciidoc.py

@@ -499,7 +499,7 @@ def _format_block(filename, what, data):
         if not found_start:
             raise Exception("Marker '// QUTE_{}_START' not found in "
                             "'{}'!".format(what, filename))
-        elif not found_end:
+        if not found_end:
             raise Exception("Marker '// QUTE_{}_END' not found in "
                             "'{}'!".format(what, filename))
     except:

scripts/hist_importer.py

@@ -155,10 +155,10 @@ def run():
     if browser not in query:
         raise Error('Sorry, the selected browser: "{}" is not '
                     'supported.'.format(browser))
-    else:
-        history = extract(source, query[browser])
-        history = clean(history)
-        insert_qb(history, dest)
+
+    history = extract(source, query[browser])
+    history = clean(history)
+    insert_qb(history, dest)
 
 
 def main():

scripts/link_pyqt.py

@@ -121,8 +121,7 @@ def get_lib_path(executable, name, required=True):
         if required:
             raise Error("Could not import {} with {}: {}!".format(
                 name, executable, data))
-        else:
-            return None
+        return None
     else:
         raise ValueError("Unexpected output: {!r}".format(output))
 

tests/end2end/fixtures/quteprocess.py

@@ -824,9 +824,9 @@ class QuteProc(testprocess.Process):
         message = self.wait_for_js('qute:*').message
         if message.endswith('qute:no elems'):
             raise ValueError('No element with {!r} found'.format(text))
-        elif message.endswith('qute:ambiguous elems'):
+        if message.endswith('qute:ambiguous elems'):
             raise ValueError('Element with {!r} is not unique'.format(text))
-        elif not message.endswith('qute:okay'):
+        if not message.endswith('qute:okay'):
             raise ValueError('Invalid response from qutebrowser: {}'
                              .format(message))
 

tests/helpers/stubs.py

@@ -301,8 +301,7 @@ class FakeSignal:
     def __call__(self):
         if self._func is None:
             raise TypeError("'FakeSignal' object is not callable")
-        else:
-            return self._func()
+        return self._func()
 
     def connect(self, slot):
         """Connect the signal to a slot.
@@ -530,10 +529,9 @@ class TabWidgetStub(QObject):
     def indexOf(self, _tab):
         if self.index_of is None:
             raise ValueError("indexOf got called with index_of None!")
-        elif self.index_of is RuntimeError:
+        if self.index_of is RuntimeError:
             raise RuntimeError
-        else:
-            return self.index_of
+        return self.index_of
 
     def currentIndex(self):
         if self.current_index is None:

tests/unit/browser/test_history.py

@@ -190,8 +190,7 @@ class TestAdd:
         def raise_error(url, replace=False):
             if environmental:
                 raise sql.SqlEnvironmentError("Error message")
-            else:
-                raise sql.SqlBugError("Error message")
+            raise sql.SqlBugError("Error message")
 
         if completion:
             monkeypatch.setattr(web_history.completion, 'insert', raise_error)

tests/unit/commands/test_userscripts.py

@@ -65,8 +65,7 @@ def runner(request, runtime_tmpdir):
             request.param is userscripts._POSIXUserscriptRunner):
         pytest.skip("Requires a POSIX os")
         raise utils.Unreachable
-    else:
-        return request.param()
+    return request.param()
 
 
 def test_command(qtbot, py_proc, runner):

tests/unit/utils/test_qtutils.py

@@ -153,8 +153,7 @@ class QtObject:
         """Get the fake error, or raise AttributeError if set to None."""
         if self._error is None:
             raise AttributeError
-        else:
-            return self._error
+        return self._error
 
     def isValid(self):
         return self._valid