diff --git a/gui/wxpython/core/utils.py b/gui/wxpython/core/utils.py
index 66137f3c974..47977a1a27b 100644
--- a/gui/wxpython/core/utils.py
+++ b/gui/wxpython/core/utils.py
@@ -1179,8 +1179,7 @@ def unregisterPid(pid):
 def get_shell_pid(env=None):
     """Get shell PID from the GIS environment or None"""
     try:
-        shell_pid = int(grass.gisenv(env=env)["PID"])
-        return shell_pid
+        return int(grass.gisenv(env=env)["PID"])
     except (KeyError, ValueError) as error:
         Debug.msg(
             1, "No PID for GRASS shell (assuming no shell running): {}".format(error)
diff --git a/gui/wxpython/core/workspace.py b/gui/wxpython/core/workspace.py
index 65a802d0809..7e5f85d6649 100644
--- a/gui/wxpython/core/workspace.py
+++ b/gui/wxpython/core/workspace.py
@@ -92,9 +92,7 @@ def __filterValue(self, value):
         :param value:
         """
         value = value.replace("&lt;", "<")
-        value = value.replace("&gt;", ">")
-
-        return value
+        return value.replace("&gt;", ">")
 
     def __getNodeText(self, node, tag, default=""):
         """Get node text"""
@@ -1043,9 +1041,7 @@ def __filterValue(self, value):
         """Make value XML-valid"""
         value = value.replace("<", "&lt;")
         value = value.replace(">", "&gt;")
-        value = value.replace("&", "&amp;")
-
-        return value
+        return value.replace("&", "&amp;")
 
     def __writeLayer(self, mapTree, item):
         """Write bunch of layers to GRASS Workspace XML file"""
diff --git a/gui/wxpython/datacatalog/tree.py b/gui/wxpython/datacatalog/tree.py
index 085b9cb7f67..6d5530733d1 100644
--- a/gui/wxpython/datacatalog/tree.py
+++ b/gui/wxpython/datacatalog/tree.py
@@ -359,8 +359,7 @@ def _getValidSavedGrassDBs(self):
         dbs = UserSettings.Get(
             group="datacatalog", key="grassdbs", subkey="listAsString"
         )
-        dbs = [db for db in dbs.split(",") if os.path.isdir(db)]
-        return dbs
+        return [db for db in dbs.split(",") if os.path.isdir(db)]
 
     def _saveGrassDBs(self):
         """Save current grass dbs in tree to settings"""
diff --git a/gui/wxpython/gcp/manager.py b/gui/wxpython/gcp/manager.py
index 87b18f8437d..692de174f55 100644
--- a/gui/wxpython/gcp/manager.py
+++ b/gui/wxpython/gcp/manager.py
@@ -1792,7 +1792,7 @@ def _getOverWriteDialog(self, maptype, overwrite):
             map_name = "<{}>".format(found["name"])
 
         if found["name"] and not overwrite:
-            overwrite_dlg = wx.MessageDialog(
+            return wx.MessageDialog(
                 self.GetParent(),
                 message=_(
                     "The {map_type} map {map_name} exists. "
@@ -1804,7 +1804,6 @@ def _getOverWriteDialog(self, maptype, overwrite):
                 caption=_("Overwrite?"),
                 style=wx.YES_NO | wx.YES_DEFAULT | wx.ICON_QUESTION,
             )
-            return overwrite_dlg
 
     def OnGeorect(self, event):
         """
diff --git a/gui/wxpython/gmodeler/model.py b/gui/wxpython/gmodeler/model.py
index 864f1df68e9..f0599b70d61 100644
--- a/gui/wxpython/gmodeler/model.py
+++ b/gui/wxpython/gmodeler/model.py
@@ -2027,9 +2027,7 @@ def _filterValue(self, value):
         :param value:
         """
         value = value.replace("&lt;", "<")
-        value = value.replace("&gt;", ">")
-
-        return value
+        return value.replace("&gt;", ">")
 
     def _getNodeText(self, node, tag, default=""):
         """Get node text"""
@@ -2342,8 +2340,7 @@ def _filterValue(self, value):
         :param value: string to be escaped as XML
         :return: a XML-valid string
         """
-        value = saxutils.escape(value)
-        return value
+        return saxutils.escape(value)
 
     def _header(self):
         """Write header"""
diff --git a/gui/wxpython/gui_core/dialogs.py b/gui/wxpython/gui_core/dialogs.py
index 167a48ce6bb..9a19000e6e4 100644
--- a/gui/wxpython/gui_core/dialogs.py
+++ b/gui/wxpython/gui_core/dialogs.py
@@ -1208,8 +1208,7 @@ def _filter(self, data):
         """Apply filter for strings in data list"""
         flt_data = []
         if len(self.flt_pattern) == 0:
-            flt_data = data[:]
-            return flt_data
+            return data[:]
 
         for dt in data:
             try:
@@ -1872,8 +1871,7 @@ def __init__(
     def GetOpacity(self):
         """Button 'OK' pressed"""
         # return opacity value
-        opacity = float(self.value.GetValue()) / 100
-        return opacity
+        return float(self.value.GetValue()) / 100
 
     def OnApply(self, event):
         self.applyOpacity.emit(value=self.GetOpacity())
diff --git a/gui/wxpython/gui_core/forms.py b/gui/wxpython/gui_core/forms.py
index 00fd505c799..1202d699eeb 100644
--- a/gui/wxpython/gui_core/forms.py
+++ b/gui/wxpython/gui_core/forms.py
@@ -3062,8 +3062,7 @@ def AddBitmapToImageList(self, section, imageList):
             image = wx.Image(iconSectionDict[section]).Scale(
                 16, 16, wx.IMAGE_QUALITY_HIGH
             )
-            idx = imageList.Add(BitmapFromImage(image))
-            return idx
+            return imageList.Add(BitmapFromImage(image))
 
         return -1
 
diff --git a/gui/wxpython/gui_core/gselect.py b/gui/wxpython/gui_core/gselect.py
index 6b679c074b5..dc553ae74bb 100644
--- a/gui/wxpython/gui_core/gselect.py
+++ b/gui/wxpython/gui_core/gselect.py
@@ -663,8 +663,7 @@ def AddItem(self, value, mapset=None, node=True, parent=None):
 
         data = {"node": node, "mapset": mapset}
 
-        item = self.seltree.AppendItem(parent, text=value, data=data)
-        return item
+        return self.seltree.AppendItem(parent, text=value, data=data)
 
     def OnKeyUp(self, event):
         """Enables to select items using keyboard
diff --git a/gui/wxpython/gui_core/pyedit.py b/gui/wxpython/gui_core/pyedit.py
index 7c56a7f7c07..573496cbbfc 100644
--- a/gui/wxpython/gui_core/pyedit.py
+++ b/gui/wxpython/gui_core/pyedit.py
@@ -301,8 +301,7 @@ def _openFile(self, file_path):
         """
         try:
             with open(file_path, "r") as f:
-                content = f.read()
-                return content
+                return f.read()
         except PermissionError:
             GError(
                 message=_(
diff --git a/gui/wxpython/gui_core/simplelmgr.py b/gui/wxpython/gui_core/simplelmgr.py
index d59a443c9b0..9f03a49396e 100644
--- a/gui/wxpython/gui_core/simplelmgr.py
+++ b/gui/wxpython/gui_core/simplelmgr.py
@@ -377,31 +377,27 @@ def GetOptData(self, dcmd, layer, params, propwin):
 
     def AddRaster(self, name, cmd, hidden, dialog):
         """Ads new raster layer."""
-        layer = self._layerList.AddNewLayer(
+        return self._layerList.AddNewLayer(
             name=name, mapType="raster", active=True, cmd=cmd, hidden=hidden
         )
-        return layer
 
     def AddRast3d(self, name, cmd, hidden, dialog):
         """Ads new raster3d layer."""
-        layer = self._layerList.AddNewLayer(
+        return self._layerList.AddNewLayer(
             name=name, mapType="raster_3d", active=True, cmd=cmd, hidden=hidden
         )
-        return layer
 
     def AddVector(self, name, cmd, hidden, dialog):
         """Ads new vector layer."""
-        layer = self._layerList.AddNewLayer(
+        return self._layerList.AddNewLayer(
             name=name, mapType="vector", active=True, cmd=cmd, hidden=hidden
         )
-        return layer
 
     def AddRGB(self, name, cmd, hidden, dialog):
         """Ads new vector layer."""
-        layer = self._layerList.AddNewLayer(
+        return self._layerList.AddNewLayer(
             name=name, mapType="rgb", active=True, cmd=cmd, hidden=hidden
         )
-        return layer
 
     def GetLayerInfo(self, layer, key):
         """Just for compatibility, should be removed in the future"""
diff --git a/gui/wxpython/gui_core/treeview.py b/gui/wxpython/gui_core/treeview.py
index 01bbe87d493..4c20885599c 100644
--- a/gui/wxpython/gui_core/treeview.py
+++ b/gui/wxpython/gui_core/treeview.py
@@ -91,8 +91,7 @@ def OnGetItemText(self, index, column=0):
         """
         node = self._model.GetNodeByIndex(index)
         # remove & because of & needed in menu (&Files)
-        label = node.label.replace("&", "")
-        return label
+        return node.label.replace("&", "")
 
     def OnGetChildrenCount(self, index):
         """Overridden method necessary to communicate with tree model."""
@@ -258,8 +257,7 @@ def OnGetItemText(self, index, column=0):
         if column > 0:
             return node.data.get(self._columns[column], "")
         else:
-            label = node.label.replace("&", "")
-            return label
+            return node.label.replace("&", "")
 
     def OnRightClick(self, event):
         """Select item on right click.
diff --git a/gui/wxpython/gui_core/widgets.py b/gui/wxpython/gui_core/widgets.py
index 61225b8c21f..3196ff173db 100644
--- a/gui/wxpython/gui_core/widgets.py
+++ b/gui/wxpython/gui_core/widgets.py
@@ -1338,11 +1338,7 @@ def _searchModule(self, keys, value):
         nodes.sort(key=self._model.GetIndexOfNode)
         self._results = nodes
         self._resultIndex = -1
-        commands = sorted(
-            [node.data["command"] for node in nodes if node.data["command"]]
-        )
-
-        return commands
+        return sorted([node.data["command"] for node in nodes if node.data["command"]])
 
     def OnSelectModule(self, event=None):
         """Module selected from choice, update command prompt"""
diff --git a/gui/wxpython/history/tree.py b/gui/wxpython/history/tree.py
index 0e9d75870aa..8bccc3e97a7 100644
--- a/gui/wxpython/history/tree.py
+++ b/gui/wxpython/history/tree.py
@@ -215,12 +215,10 @@ def _timestampToDay(self, timestamp=None):
             return OLD_DATE
 
         timestamp_datetime = datetime.datetime.fromisoformat(timestamp)
-        day_midnight = datetime.datetime(
+        return datetime.datetime(
             timestamp_datetime.year, timestamp_datetime.month, timestamp_datetime.day
         ).date()
 
-        return day_midnight
-
     def _initHistoryModel(self):
         """Fill tree history model based on the current history log."""
         content_list = self.ReadFromHistory()
diff --git a/gui/wxpython/iclass/digit.py b/gui/wxpython/iclass/digit.py
index 691c1e75080..a6f0ef15948 100644
--- a/gui/wxpython/iclass/digit.py
+++ b/gui/wxpython/iclass/digit.py
@@ -126,8 +126,7 @@ def _getNewFeaturesLayer(self):
         return 1
 
     def _getNewFeaturesCat(self):
-        cat = self.mapWindow.GetCurrentCategory()
-        return cat
+        return self.mapWindow.GetCurrentCategory()
 
     def DeleteAreasByCat(self, cats):
         """Delete areas (centroid+boundaries) by categories
diff --git a/gui/wxpython/iscatt/frame.py b/gui/wxpython/iscatt/frame.py
index bf5dfac91e4..6d87a90e273 100644
--- a/gui/wxpython/iscatt/frame.py
+++ b/gui/wxpython/iscatt/frame.py
@@ -330,8 +330,7 @@ def _newScatterPlotName(self, scatt_id):
         return name
 
     def _getScatterPlotName(self, i):
-        name = "scatter plot %d" % i
-        return name
+        return "scatter plot %d" % i
 
     def NewScatterPlot(self, scatt_id, transpose):
         # TODO needs to be resolved (should be in this class)
diff --git a/gui/wxpython/iscatt/iscatt_core.py b/gui/wxpython/iscatt/iscatt_core.py
index c663233a5e8..2eaa463940d 100644
--- a/gui/wxpython/iscatt/iscatt_core.py
+++ b/gui/wxpython/iscatt/iscatt_core.py
@@ -488,9 +488,7 @@ def GetBandsInfo(self, scatt_id):
         b1_info = self.an_data.GetBandInfo(b1)
         b2_info = self.an_data.GetBandInfo(b2)
 
-        bands_info = {"b1": b1_info, "b2": b2_info}
-
-        return bands_info
+        return {"b1": b1_info, "b2": b2_info}
 
     def DeleScattPlot(self, cat_id, scatt_id):
         if cat_id not in self.cats:
@@ -784,15 +782,13 @@ def idBandsToidScatt(band_1_id, band_2_id, n_bands):
 
     n_b1 = n_bands - 1
 
-    scatt_id = int(
+    return int(
         (band_1_id * (2 * n_b1 + 1) - band_1_id * band_1_id) / 2
         + band_2_id
         - band_1_id
         - 1
     )
 
-    return scatt_id
-
 
 def GetRegion():
     ret, region, msg = RunCommand("g.region", flags="gp", getErrorMsg=True, read=True)
diff --git a/gui/wxpython/iscatt/plots.py b/gui/wxpython/iscatt/plots.py
index ba951e0eec3..f9cad136314 100644
--- a/gui/wxpython/iscatt/plots.py
+++ b/gui/wxpython/iscatt/plots.py
@@ -711,8 +711,7 @@ def GetCoords(self):
         if self.empty_pol:
             return None
 
-        coords = deepcopy(self.pol.xy)
-        return coords
+        return deepcopy(self.pol.xy)
 
     def SetEmpty(self):
         self._setEmptyPol(True)
diff --git a/gui/wxpython/lmgr/frame.py b/gui/wxpython/lmgr/frame.py
index 0b5a07b8f07..ddb91789508 100644
--- a/gui/wxpython/lmgr/frame.py
+++ b/gui/wxpython/lmgr/frame.py
@@ -2336,13 +2336,12 @@ def MsgDisplayResolution(self, limitText=None):
         )
         if limitText:
             message += "\n\n%s" % _(limitText)
-        dlg = wx.MessageDialog(
+        return wx.MessageDialog(
             parent=self,
             message=message,
             caption=_("Constrain map to region geometry?"),
             style=wx.YES_NO | wx.YES_DEFAULT | wx.ICON_QUESTION | wx.CENTRE,
         )
-        return dlg
 
     def _onMapsetWatchdog(self, map_path, map_dest):
         """Current mapset watchdog event handler
diff --git a/gui/wxpython/lmgr/layertree.py b/gui/wxpython/lmgr/layertree.py
index 3ef19ba46b1..e935af8ce5d 100644
--- a/gui/wxpython/lmgr/layertree.py
+++ b/gui/wxpython/lmgr/layertree.py
@@ -2428,7 +2428,7 @@ def _createCommandCtrl(self):
         height = 25
         if sys.platform in {"win32", "darwin"}:
             height = 40
-        ctrl = TextCtrl(
+        return TextCtrl(
             self,
             id=wx.ID_ANY,
             value="",
@@ -2436,4 +2436,3 @@ def _createCommandCtrl(self):
             size=(self.GetSize()[0] - 100, height),
             style=wx.TE_PROCESS_ENTER | wx.TE_DONTWRAP,
         )
-        return ctrl
diff --git a/gui/wxpython/location_wizard/wizard.py b/gui/wxpython/location_wizard/wizard.py
index 408371ad21c..41c84d4ca70 100644
--- a/gui/wxpython/location_wizard/wizard.py
+++ b/gui/wxpython/location_wizard/wizard.py
@@ -743,8 +743,7 @@ def GetSortImages(self):
     def OnGetItemText(self, item, col):
         """Get item text"""
         index = self.itemIndexMap[item]
-        s = str(self.itemDataMap[index][col])
-        return s
+        return str(self.itemDataMap[index][col])
 
     def OnGetItemImage(self, item):
         return -1
@@ -2795,9 +2794,7 @@ def CreateProj4String(self):
             for item in datumparams:
                 proj4string = "%s +%s" % (proj4string, item)
 
-        proj4string = "%s +no_defs" % proj4string
-
-        return proj4string
+        return "%s +no_defs" % proj4string
 
     def OnHelp(self, event):
         """'Help' button clicked"""
diff --git a/gui/wxpython/main_window/frame.py b/gui/wxpython/main_window/frame.py
index 57cf6efb868..6b9a9be640f 100644
--- a/gui/wxpython/main_window/frame.py
+++ b/gui/wxpython/main_window/frame.py
@@ -2430,13 +2430,12 @@ def MsgDisplayResolution(self, limitText=None):
         )
         if limitText:
             message += "\n\n%s" % _(limitText)
-        dlg = wx.MessageDialog(
+        return wx.MessageDialog(
             parent=self,
             message=message,
             caption=_("Constrain map to region geometry?"),
             style=wx.YES_NO | wx.YES_DEFAULT | wx.ICON_QUESTION | wx.CENTRE,
         )
-        return dlg
 
     def _onMapsetWatchdog(self, map_path, map_dest):
         """Current mapset watchdog event handler
diff --git a/gui/wxpython/nviz/mapwindow.py b/gui/wxpython/nviz/mapwindow.py
index 3d282cc3c14..30a7682f6c7 100644
--- a/gui/wxpython/nviz/mapwindow.py
+++ b/gui/wxpython/nviz/mapwindow.py
@@ -243,7 +243,7 @@ def GetContentScaleFactor(self):
 
     def InitFly(self):
         """Initialize fly through dictionary"""
-        fly = {
+        return {
             "interval": 10,  # interval for timerFly
             "value": [0, 0, 0],  # calculated values for navigation
             "mode": 0,  # fly through mode (0, 1)
@@ -264,8 +264,6 @@ def InitFly(self):
             "flySpeedStep": 2,
         }
 
-        return fly
-
     def OnTimerFly(self, event):
         """Fly event was emitted, move the scene"""
         if self.mouse["use"] != "fly":
diff --git a/gui/wxpython/nviz/wxnviz.py b/gui/wxpython/nviz/wxnviz.py
index f967d830d5d..8002d6f32d2 100644
--- a/gui/wxpython/nviz/wxnviz.py
+++ b/gui/wxpython/nviz/wxnviz.py
@@ -2212,9 +2212,7 @@ def Load(self):
                     ]
         wx.EndBusyCursor()
 
-        id = Nviz_load_image(im, self.width, self.height, self.image.HasAlpha())
-
-        return id
+        return Nviz_load_image(im, self.width, self.height, self.image.HasAlpha())
 
     def Draw(self):
         """Draw texture as an image"""
diff --git a/gui/wxpython/psmap/dialogs.py b/gui/wxpython/psmap/dialogs.py
index 6094c805e60..8ee3661d8b5 100644
--- a/gui/wxpython/psmap/dialogs.py
+++ b/gui/wxpython/psmap/dialogs.py
@@ -3200,8 +3200,7 @@ def getColsChoice(self, parent):
         else:
             cols = []
 
-        choice = Choice(parent=parent, id=wx.ID_ANY, choices=cols)
-        return choice
+        return Choice(parent=parent, id=wx.ID_ANY, choices=cols)
 
     def update(self):
         # feature type
diff --git a/gui/wxpython/psmap/frame.py b/gui/wxpython/psmap/frame.py
index a03021acc2f..4f0a2220fd5 100644
--- a/gui/wxpython/psmap/frame.py
+++ b/gui/wxpython/psmap/frame.py
@@ -2613,9 +2613,7 @@ def ImageRect(self):
         iH = iH * self.currScale
         x = cW / 2 - iW / 2
         y = cH / 2 - iH / 2
-        imageRect = Rect(int(x), int(y), int(iW), int(iH))
-
-        return imageRect
+        return Rect(int(x), int(y), int(iW), int(iH))
 
     def RedrawSelectBox(self, id):
         """Redraws select box when selected object changes its size"""
diff --git a/gui/wxpython/psmap/instructions.py b/gui/wxpython/psmap/instructions.py
index bca686898cb..bc10a1c0e46 100644
--- a/gui/wxpython/psmap/instructions.py
+++ b/gui/wxpython/psmap/instructions.py
@@ -1913,8 +1913,7 @@ def __init__(self, id, env):
         self.instruction = dict(self.defaultInstruction)
 
     def __str__(self):
-        instr = string.Template("raster $raster").substitute(self.instruction)
-        return instr
+        return string.Template("raster $raster").substitute(self.instruction)
 
     def Read(self, instruction, text):
         """Read instruction and save information"""
diff --git a/gui/wxpython/psmap/utils.py b/gui/wxpython/psmap/utils.py
index 3e60ad6c2b6..d54a45a52be 100644
--- a/gui/wxpython/psmap/utils.py
+++ b/gui/wxpython/psmap/utils.py
@@ -402,8 +402,7 @@ def getRasterType(map):
         map = ""
     file = gs.find_file(name=map, element="cell")
     if file.get("file"):
-        rasterType = gs.raster_info(map)["datatype"]
-        return rasterType
+        return gs.raster_info(map)["datatype"]
     else:
         return None
 
diff --git a/gui/wxpython/rlisetup/sampling_frame.py b/gui/wxpython/rlisetup/sampling_frame.py
index 2526d0537f8..dcd8398d049 100644
--- a/gui/wxpython/rlisetup/sampling_frame.py
+++ b/gui/wxpython/rlisetup/sampling_frame.py
@@ -385,8 +385,7 @@ def writeCircle(self, circle, rasterName):
         grass.use_temp_region()
         grass.run_command("g.region", zoom=rasterName)
         region = grass.region()
-        marea = MaskedArea(region, rasterName, circle.radius)
-        return marea
+        return MaskedArea(region, rasterName, circle.radius)
 
     def _rectangleDrawn(self):
         """When drawing finished, get region values"""
diff --git a/gui/wxpython/startup/guiutils.py b/gui/wxpython/startup/guiutils.py
index 8bf4debef66..d9f59696375 100644
--- a/gui/wxpython/startup/guiutils.py
+++ b/gui/wxpython/startup/guiutils.py
@@ -165,9 +165,8 @@ def create_location_interactively(guiparent, grassdb):
     gWizard = LocationWizard(parent=guiparent, grassdatabase=grassdb)
 
     if gWizard.location is None:
-        gWizard_output = (None, None, None)
+        return (None, None, None)
         # Returns Nones after Cancel
-        return gWizard_output
 
     if gWizard.georeffile:
         message = _("Do you want to import {} to the newly created project?").format(
diff --git a/gui/wxpython/startup/locdownload.py b/gui/wxpython/startup/locdownload.py
index 5a4eddbaf9d..4592103a0f9 100644
--- a/gui/wxpython/startup/locdownload.py
+++ b/gui/wxpython/startup/locdownload.py
@@ -121,8 +121,7 @@ def _get_heigth(self, string):
         n_lines = string.count("\n")
         attr = self.out.GetClassDefaultAttributes()
         font_size = attr.font.GetPointSize()
-        heigth = int((n_lines + 2) * font_size // 0.75)  # 1 px = 0.75 pt
-        return heigth
+        return int((n_lines + 2) * font_size // 0.75)  # 1 px = 0.75 pt
 
     def _resize(self, heigth=-1):
         """Resize widget heigth
diff --git a/gui/wxpython/vnet/vnet_core.py b/gui/wxpython/vnet/vnet_core.py
index deaf11ff670..17d85ef6ca4 100644
--- a/gui/wxpython/vnet/vnet_core.py
+++ b/gui/wxpython/vnet/vnet_core.py
@@ -1030,8 +1030,7 @@ def AddTmpMapAnalysisMsg(mapName, tmp_maps):  # TODO
         "Temporary map %s  already exists.\n"
         + "Do you want to continue in analysis and overwrite it?"
     ) % (mapName + "@" + grass.gisenv()["MAPSET"])
-    tmpMap = tmp_maps.AddTmpVectMap(mapName, msg)
-    return tmpMap
+    return tmp_maps.AddTmpVectMap(mapName, msg)
 
 
 class SnappingNodes(wx.EvtHandler):
diff --git a/gui/wxpython/vnet/vnet_data.py b/gui/wxpython/vnet/vnet_data.py
index 9f2d11cf46a..e978a82314e 100644
--- a/gui/wxpython/vnet/vnet_data.py
+++ b/gui/wxpython/vnet/vnet_data.py
@@ -666,8 +666,7 @@ def _getInvalidParams(self, params):
                 vectMaps = grass.list_grouped("vector")[mapSet]
 
         if not params["input"] or mapName not in vectMaps:
-            invParams = list(params.keys())[:]
-            return invParams
+            return list(params.keys())[:]
 
         # check arc/node layer
         layers = utils.GetVectorNumberOfLayers(params["input"])
@@ -1252,8 +1251,7 @@ def _parseValue(self, value, read=False):
                     value[0] == "[" and value[-1] == "]"
                 ):  # TODO, possible wrong interpretation
                     value = value[1:-1].split(",")
-                    value = map(self._castValue, value)
-                    return value
+                    return map(self._castValue, value)
 
             if value == "True":
                 value = True
diff --git a/imagery/i.atcorr/create_iwave.py b/imagery/i.atcorr/create_iwave.py
index b895d3d5125..243e7a22542 100644
--- a/imagery/i.atcorr/create_iwave.py
+++ b/imagery/i.atcorr/create_iwave.py
@@ -191,8 +191,7 @@ def pretty_print(filter_f):
             if i < len(filter_f):
                 pstring += ", "
     # trim starting \n and trailing ,
-    pstring = pstring.lstrip("\n").rstrip(", ")
-    return pstring
+    return pstring.lstrip("\n").rstrip(", ")
 
 
 def write_cpp(bands, values, sensor, folder):
diff --git a/man/build_manual_gallery.py b/man/build_manual_gallery.py
index 10fdb143989..414b36c8a85 100755
--- a/man/build_manual_gallery.py
+++ b/man/build_manual_gallery.py
@@ -123,8 +123,7 @@ def remove_module_name(string, module):
     string = string.replace(module.replace("wxGUI.", "g.gui."), "")
     string = string.replace(module.replace(".", "_"), "")  # using _
     string = string.replace(module.replace(".", ""), "")  # using nothing
-    string = string.replace(module, "")  # using original dots
-    return string
+    return string.replace(module, "")  # using original dots
 
 
 def title_from_names(module_name, img_name):
diff --git a/pyproject.toml b/pyproject.toml
index ab792fe2ac6..2ca0e33f163 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -237,7 +237,13 @@ ignore = [
     "PTH202",  # os-path-getsize
     "PTH204",  # os-path-getmtime
     "PTH207",  # glob
-    "RET50",   # flake8-return (RET)
+    "RET501", # unnecessary-return-none
+    "RET502", # implicit-return-value
+    "RET503", # implicit-return
+    "RET505", # superfluous-else-return
+    "RET506", # superfluous-else-raise
+    "RET507", # superfluous-else-continue
+    "RET508", # superfluous-else-break
     "RSE102",  # unnecessary-paren-on-raise-exception
     "RUF002",  # ambiguous-unicode-character-docstring
     "RUF003",  # ambiguous-unicode-character-comment
diff --git a/python/grass/grassdb/checks.py b/python/grass/grassdb/checks.py
index c1ef7cc76c2..b8748de9876 100644
--- a/python/grass/grassdb/checks.py
+++ b/python/grass/grassdb/checks.py
@@ -605,9 +605,7 @@ def get_reasons_grassdb_not_removable(grassdb):
     locations = []
     for g_location in g_locations:
         locations.append((grassdb, g_location))
-    messages = get_reasons_locations_not_removable(locations)
-
-    return messages
+    return get_reasons_locations_not_removable(locations)
 
 
 def get_list_of_locations(dbase):
diff --git a/python/grass/grassdb/history.py b/python/grass/grassdb/history.py
index ec7b1dc14eb..ba9ed818f36 100644
--- a/python/grass/grassdb/history.py
+++ b/python/grass/grassdb/history.py
@@ -53,8 +53,7 @@ def get_history_file_extension(history_path):
     :return str extension: None (plain text) or .json
     """
     file_path = Path(history_path)
-    extension = file_path.suffix
-    return extension
+    return file_path.suffix
 
 
 def ensure_history_file(history_path):
@@ -275,14 +274,13 @@ def get_initial_command_info(env_run):
     region_settings = gs.region(env=env_run)
 
     # Finalize the command info dictionary
-    cmd_info = {
+    return {
         "timestamp": exec_time,
         "mask2d": mask2d_present,
         "mask3d": mask3d_present,
         "region": region_settings,
         "status": Status.RUNNING.value,
     }
-    return cmd_info
 
 
 def _add_entry_to_JSON(history_path, entry):
diff --git a/python/grass/gunittest/reporters.py b/python/grass/gunittest/reporters.py
index e5455c33b39..63bffc655e1 100644
--- a/python/grass/gunittest/reporters.py
+++ b/python/grass/gunittest/reporters.py
@@ -295,7 +295,7 @@ def get_html_test_authors_table(directory, tests_authors):
     if not not_testing_authors:
         not_testing_authors = ["all recent authors contributed tests"]
 
-    test_authors = (
+    return (
         "<h3>Code and test authors</h3>"
         '<p style="font-size: 60%"><em>'
         "Note that determination of authors is approximate and only"
@@ -311,7 +311,6 @@ def get_html_test_authors_table(directory, tests_authors):
             not_testing=", ".join(sorted(not_testing_authors)),
         )
     )
-    return test_authors
 
 
 class GrassTestFilesMultiReporter:
@@ -1212,7 +1211,7 @@ def report_for_dir(self, root, directory, test_files):
         page.close()
 
         status = success_to_html_text(total=file_total, successes=file_successes)
-        row = (
+        return (
             "<tr>"
             '<td><a href="{d}/{page}">{d}</a></td><td>{status}</td>'
             "<td>{nfiles}</td><td>{sfiles}</td><td>{pfiles}</td>"
@@ -1231,7 +1230,6 @@ def report_for_dir(self, root, directory, test_files):
                 ptests=dir_pass_per,
             )
         )
-        return row
 
     def report_for_dirs(self, root, directories):
         # TODO: this will need changes according to potential changes in
diff --git a/python/grass/imaging/images2gif.py b/python/grass/imaging/images2gif.py
index b80f452cf8c..ba681dca77d 100644
--- a/python/grass/imaging/images2gif.py
+++ b/python/grass/imaging/images2gif.py
@@ -1105,8 +1105,7 @@ def convert(self, *color):
     def inxsearch(self, r, g, b):
         """Search for BGR values 0..255 and return colour index"""
         dists = self.colormap[:, :3] - np.array([r, g, b])
-        a = np.argmin((dists * dists).sum(1))
-        return a
+        return np.argmin((dists * dists).sum(1))
 
 
 if __name__ == "__main__":
diff --git a/python/grass/jupyter/utils.py b/python/grass/jupyter/utils.py
index f06adfa36d1..4d76b166361 100644
--- a/python/grass/jupyter/utils.py
+++ b/python/grass/jupyter/utils.py
@@ -113,8 +113,7 @@ def estimate_resolution(raster, mapset, location, dbase, env):
     output = gs.parse_key_val(output, val_type=float)
     cell_ns = (output["n"] - output["s"]) / output["rows"]
     cell_ew = (output["e"] - output["w"]) / output["cols"]
-    estimate = (cell_ew + cell_ns) / 2.0
-    return estimate
+    return (cell_ew + cell_ns) / 2.0
 
 
 def setup_location(name, path, epsg, src_env):
diff --git a/python/grass/pydispatch/saferef.py b/python/grass/pydispatch/saferef.py
index 6a65f262714..43be1175b19 100644
--- a/python/grass/pydispatch/saferef.py
+++ b/python/grass/pydispatch/saferef.py
@@ -28,8 +28,7 @@ def safeRef(target, onDelete=None):
                 """but no %s, don't know how """
                 """to create reference""" % (target, im_self, im_func)
             )
-            reference = BoundMethodWeakref(target=target, onDelete=onDelete)
-            return reference
+            return BoundMethodWeakref(target=target, onDelete=onDelete)
     if onDelete is not None:
         return weakref.ref(target, onDelete)
     else:
diff --git a/python/grass/pygrass/modules/interface/env.py b/python/grass/pygrass/modules/interface/env.py
index 4fbef04dae3..ad6e4c4800e 100644
--- a/python/grass/pygrass/modules/interface/env.py
+++ b/python/grass/pygrass/modules/interface/env.py
@@ -14,13 +14,12 @@ def get_env():
     if gisrc is None:
         raise RuntimeError("You are not in a GRASS session, GISRC not found.")
     with open(gisrc, mode="r") as grc:
-        env = dict(
+        return dict(
             [
                 (k.strip(), v.strip())
                 for k, v in [row.split(":", 1) for row in grc if row]
             ]
         )
-    return env
 
 
 def get_debug_level():
diff --git a/python/grass/pygrass/shell/show.py b/python/grass/pygrass/shell/show.py
index 94b0807debe..20b721e726b 100644
--- a/python/grass/pygrass/shell/show.py
+++ b/python/grass/pygrass/shell/show.py
@@ -7,5 +7,4 @@
 
 def raw_figure(figpath):
     with open(figpath, mode="rb") as data:
-        res = data.read()
-    return res
+        return data.read()
diff --git a/python/grass/pygrass/vector/geometry.py b/python/grass/pygrass/vector/geometry.py
index 5b39d547bec..6ddbd70db7d 100644
--- a/python/grass/pygrass/vector/geometry.py
+++ b/python/grass/pygrass/vector/geometry.py
@@ -1380,8 +1380,7 @@ def _centroid(self, side, idonly=False):
             if idonly:
                 return v_id
             else:
-                cntr = Centroid(v_id=v_id, c_mapinfo=self.c_mapinfo)
-                return cntr
+                return Centroid(v_id=v_id, c_mapinfo=self.c_mapinfo)
 
     def left_centroid(self, idonly=False):
         """Return left centroid
diff --git a/python/grass/script/core.py b/python/grass/script/core.py
index 5458ea1cb78..b22815bafb6 100644
--- a/python/grass/script/core.py
+++ b/python/grass/script/core.py
@@ -983,9 +983,7 @@ def tempname(length, lowercase=False):
     if not lowercase:
         chars += string.ascii_uppercase
     random_part = "".join(random.choice(chars) for _ in range(length))
-    randomname = "tmp_" + random_part
-
-    return randomname
+    return "tmp_" + random_part
 
 
 def _compare_projection(dic):
diff --git a/python/grass/script/task.py b/python/grass/script/task.py
index 3dfe8049841..9ab76eedcb8 100644
--- a/python/grass/script/task.py
+++ b/python/grass/script/task.py
@@ -429,8 +429,7 @@ def _get_node_text(self, node, tag, default=""):
         """Get node text"""
         p = node.find(tag)
         if p is not None:
-            res = " ".join(p.text.split())
-            return res
+            return " ".join(p.text.split())
 
         return default
 
@@ -453,9 +452,7 @@ def convert_xml_to_utf8(xml_text):
     # modify: change the encoding to "utf-8", for correct parsing
     xml_text_utf8 = xml_text.decode(enc.decode("ascii")).encode("utf-8")
     p = re.compile(b'encoding="' + enc + b'"', re.IGNORECASE)
-    xml_text_utf8 = p.sub(b'encoding="utf-8"', xml_text_utf8)
-
-    return xml_text_utf8
+    return p.sub(b'encoding="utf-8"', xml_text_utf8)
 
 
 def get_interface_description(cmd):
@@ -508,13 +505,12 @@ def get_interface_description(cmd):
         )
 
     desc = convert_xml_to_utf8(cmdout)
-    desc = desc.replace(
+    return desc.replace(
         b"grass-interface.dtd",
         os.path.join(os.getenv("GISBASE"), "gui", "xml", "grass-interface.dtd").encode(
             "utf-8"
         ),
     )
-    return desc
 
 
 def parse_interface(name, parser=processTask, blackList=None):
diff --git a/python/grass/script/utils.py b/python/grass/script/utils.py
index 0269ff15d2d..13d049412a4 100644
--- a/python/grass/script/utils.py
+++ b/python/grass/script/utils.py
@@ -91,8 +91,7 @@ def diff_files(filename_a, filename_b):
     differ = difflib.Differ()
     fh_a = open(filename_a, "r")
     fh_b = open(filename_b, "r")
-    result = list(differ.compare(fh_a.readlines(), fh_b.readlines()))
-    return result
+    return list(differ.compare(fh_a.readlines(), fh_b.readlines()))
 
 
 def try_remove(path):
diff --git a/python/grass/temporal/abstract_space_time_dataset.py b/python/grass/temporal/abstract_space_time_dataset.py
index 7f8209d8072..6376261cf72 100644
--- a/python/grass/temporal/abstract_space_time_dataset.py
+++ b/python/grass/temporal/abstract_space_time_dataset.py
@@ -98,10 +98,7 @@ def create_map_register_name(self):
 
         uuid_rand = str(uuid.uuid4()).replace("-", "")
 
-        table_name = (
-            self.get_new_map_instance(None).get_type() + "_map_register_" + uuid_rand
-        )
-        return table_name
+        return self.get_new_map_instance(None).get_type() + "_map_register_" + uuid_rand
 
     @abstractmethod
     def get_new_map_instance(self, ident=None):
diff --git a/python/grass/temporal/mapcalc.py b/python/grass/temporal/mapcalc.py
index 1d098f33647..5f29cd32747 100644
--- a/python/grass/temporal/mapcalc.py
+++ b/python/grass/temporal/mapcalc.py
@@ -481,9 +481,7 @@ def _operator_parser(expr, first, current):
     expr = _parse_start_time_operator(expr, is_time_absolute, first, current)
     expr = _parse_end_time_operator(expr, is_time_absolute, first, current)
     expr = _parse_start_operators(expr, is_time_absolute, current)
-    expr = _parse_end_operators(expr, is_time_absolute, current)
-
-    return expr
+    return _parse_end_operators(expr, is_time_absolute, current)
 
 
 ###############################################################################
diff --git a/python/grass/temporal/spatial_extent.py b/python/grass/temporal/spatial_extent.py
index b30aaa799af..3bf67b3d533 100644
--- a/python/grass/temporal/spatial_extent.py
+++ b/python/grass/temporal/spatial_extent.py
@@ -294,7 +294,7 @@ def intersect_2d(self, extent):
         if S < eS:
             nS = eS
 
-        new = SpatialExtent(
+        return SpatialExtent(
             north=nN,
             south=nS,
             east=nE,
@@ -303,7 +303,6 @@ def intersect_2d(self, extent):
             bottom=0,
             proj=self.get_projection(),
         )
-        return new
 
     def intersect(self, extent):
         """Return the three dimensional intersection as spatial_extent
@@ -459,7 +458,7 @@ def disjoint_union_2d(self, extent):
         if S > eS:
             nS = eS
 
-        new = SpatialExtent(
+        return SpatialExtent(
             north=nN,
             south=nS,
             east=nE,
@@ -468,7 +467,6 @@ def disjoint_union_2d(self, extent):
             bottom=0,
             proj=self.get_projection(),
         )
-        return new
 
     def union(self, extent):
         """Return the three dimensional union as spatial_extent
diff --git a/python/grass/temporal/temporal_algebra.py b/python/grass/temporal/temporal_algebra.py
index 66a24a3a154..fefb4e00f60 100644
--- a/python/grass/temporal/temporal_algebra.py
+++ b/python/grass/temporal/temporal_algebra.py
@@ -1179,8 +1179,7 @@ def set_temporal_extent_list(self, maplist, topolist=["EQUAL"], temporal="l"):
             #    resultlist.append(map_new)
         # Get sorted map objects as values from result dictionary.
         resultlist = resultdict.values()
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def remove_maps(self):
         """Removes empty or intermediate maps of different type."""
@@ -1641,9 +1640,7 @@ def build_spatio_temporal_topology_list(
         resultlist = resultdict.values()
 
         # Sort list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def assign_bool_value(
         self, map_i, temporal_topo_list=["EQUAL"], spatial_topo_list=[]
@@ -1871,8 +1868,7 @@ def perform_temporal_selection(
                     #        map_i.condition_value.append(False)
 
         # Sort list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def set_granularity(self, maplistA, maplistB, toperator="l", topolist=["EQUAL"]):
         """This function sets the temporal extends of a list of maps based on
@@ -2006,13 +2002,11 @@ def set_granularity(self, maplistA, maplistB, toperator="l", topolist=["EQUAL"])
 
         resultlist = resultdict.values()
         # Sort list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
         # Get relations to maplistB per map in A.
         # Loop over all relations from list
         # temporal extent = map.temporal_intersection(map)
         # if temporal extend is None = delete map.
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def get_temporal_func_dict(self, map):
         """This function creates a dictionary containing temporal functions for a
@@ -2196,18 +2190,15 @@ def eval_map_list(self, maplist, thenlist, topolist=["EQUAL"]):
         """
         # Get topology of then statement map list in relation to the other maplist
         # and assign boolean values of the maplist to the thenlist.
-        containlist = self.perform_temporal_selection(
-            thenlist, maplist, assign_val=True, topolist=topolist
-        )
         # Inverse selection of maps from thenlist and assigning False values.
         # excludelist = self.perform_temporal_selection(thenlist, maplist,
         #                                              assign_val = True,
         #                                              inverse = True,
         #                                              topolist = topolist)
         # Combining the selection and inverse selection list.
-        resultlist = containlist  # + excludelist
-
-        return resultlist
+        return self.perform_temporal_selection(
+            thenlist, maplist, assign_val=True, topolist=topolist
+        )
 
     def build_condition_list(self, tvarexpr, thenlist, topolist=["EQUAL"]):
         """This function evaluates temporal variable expressions of a conditional
@@ -2285,9 +2276,7 @@ def build_condition_list(self, tvarexpr, thenlist, topolist=["EQUAL"]):
                         resultlist = self.eval_global_var(expr, thenlist)
 
         # Sort resulting list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def eval_condition_list(self, maplist, inverse=False):
         """This function evaluates conditional values of a map list.
@@ -2336,9 +2325,7 @@ def recurse_compare(conditionlist):
                     conditionlist[ele_index - 2] = result
                     recurse_compare(conditionlist)
 
-            resultlist = conditionlist
-
-            return resultlist
+            return conditionlist
 
         resultlist = []
         inverselist = []
diff --git a/python/grass/temporal/temporal_raster_base_algebra.py b/python/grass/temporal/temporal_raster_base_algebra.py
index f9333d79044..4ca921adaaf 100644
--- a/python/grass/temporal/temporal_raster_base_algebra.py
+++ b/python/grass/temporal/temporal_raster_base_algebra.py
@@ -354,9 +354,7 @@ def build_spatio_temporal_topology_list(
         resultlist = resultdict.values()
 
         # Sort list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def build_command_string(self, map_i, relmap, operator=None, cmd_type=None):
         """This function build the r.mapcalc command string for conditionals,
@@ -636,9 +634,7 @@ def set_temporal_extent_list(
             #    resultlist.append(map_new)
         # Get sorted map objects as values from result dictionary.
         resultlist = resultdict.values()
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def build_condition_cmd_list(
         self,
@@ -739,14 +735,13 @@ def build_condition_cmd_list(
             conditiontopolist = self.build_spatio_temporal_topology_list(
                 iflist, conclusionlist, topolist=condition_topolist
             )
-            resultlist = self.set_temporal_extent_list(
+            return self.set_temporal_extent_list(
                 conditiontopolist,
                 topolist=condition_topolist,
                 temporal="r",
                 cmd_bool=True,
                 cmd_type="condition",
             )
-            return resultlist
 
     def p_statement_assign(self, t):
         # This function executes the processing of raster/raster3d algebra
diff --git a/python/grass/temporal/temporal_vector_algebra.py b/python/grass/temporal/temporal_vector_algebra.py
index 7afc9978df6..d8e8474f26e 100644
--- a/python/grass/temporal/temporal_vector_algebra.py
+++ b/python/grass/temporal/temporal_vector_algebra.py
@@ -291,9 +291,7 @@ def build_spatio_temporal_topology_list(
         resultlist = resultdict.values()
 
         # Sort list of maps chronological.
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def overlay_cmd_value(self, map_i, tbrelations, function, topolist=["EQUAL"]):
         """Function to evaluate two map lists by given overlay operator.
@@ -411,8 +409,7 @@ def set_temporal_extent_list(self, maplist, topolist=["EQUAL"], temporal="l"):
             #    resultlist.append(map_new)
         # Get sorted map objects as values from result dictionary.
         resultlist = resultdict.values()
-        resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
-        return resultlist
+        return sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime)
 
     def p_statement_assign(self, t):
         # The expression should always return a list of maps.
diff --git a/scripts/r.semantic.label/testsuite/test_r_semantic_label.py b/scripts/r.semantic.label/testsuite/test_r_semantic_label.py
index 04be5d5b7bf..b7456e22633 100644
--- a/scripts/r.semantic.label/testsuite/test_r_semantic_label.py
+++ b/scripts/r.semantic.label/testsuite/test_r_semantic_label.py
@@ -24,9 +24,7 @@ def tearDownClass(cls):
 
     def read_semantic_label(self):
         with RasterRow(self.map) as rast:
-            semantic_label = rast.info.semantic_label
-
-        return semantic_label
+            return rast.info.semantic_label
 
     def test_semantic_label_assign_not_current_mapset(self):
         if not self.mapset == "PERMANENT":
diff --git a/scripts/v.import/v.import.py b/scripts/v.import/v.import.py
index 9dfe7b2149a..42e5952c76f 100755
--- a/scripts/v.import/v.import.py
+++ b/scripts/v.import/v.import.py
@@ -125,8 +125,7 @@ def cleanup():
 
 def gdal_version():
     """Returns the GDAL version as tuple"""
-    version = gs.parse_command("g.version", flags="reg")["gdal"]
-    return version
+    return gs.parse_command("g.version", flags="reg")["gdal"]
 
 
 def GDAL_COMPUTE_VERSION(maj, min, rev):
diff --git a/utils/md_isvalid.py b/utils/md_isvalid.py
index d7b2fbe6296..8b963bb953b 100644
--- a/utils/md_isvalid.py
+++ b/utils/md_isvalid.py
@@ -40,9 +40,7 @@ def check_module(module):
         )
         p.wait()
 
-        returncode = p.returncode
-
-    return returncode
+        return p.returncode
 
 
 if __name__ == "__main__":
diff --git a/utils/mkhtml.py b/utils/mkhtml.py
index 69a1ba1db76..c5a7519872d 100644
--- a/utils/mkhtml.py
+++ b/utils/mkhtml.py
@@ -514,8 +514,7 @@ def get_last_git_commit(src_dir, addon_path, is_addon):
 def read_file(name):
     try:
         with open(name) as f:
-            s = f.read()
-        return s
+            return f.read()
     except OSError:
         return ""
 
diff --git a/utils/test_generate_last_commit_file.py b/utils/test_generate_last_commit_file.py
index 3183b786c78..e6218b9cc4f 100644
--- a/utils/test_generate_last_commit_file.py
+++ b/utils/test_generate_last_commit_file.py
@@ -28,8 +28,7 @@
 
 @pytest.fixture
 def json_file():
-    file_name = "core_modules_with_last_commit.json"
-    return file_name
+    return "core_modules_with_last_commit.json"
 
 
 @pytest.fixture