diff --git a/python/resdata/gravimetry/__init__.py b/python/resdata/gravimetry/__init__.py
index 1035865aa..e74a01cd8 100644
--- a/python/resdata/gravimetry/__init__.py
+++ b/python/resdata/gravimetry/__init__.py
@@ -1,10 +1,10 @@
 """
-  rd_grav/ResdataGrav: Class used to simplify evaluation of
-     modelling time-lapse gravitational surveys.
+rd_grav/ResdataGrav: Class used to simplify evaluation of
+   modelling time-lapse gravitational surveys.
 
-  rd_subsidence/ResdataSubsidence: Small class used to evaluate simulated
-     subsidence from simulations; analogous to the EcLGrav
-     functionality.
+rd_subsidence/ResdataSubsidence: Small class used to evaluate simulated
+   subsidence from simulations; analogous to the EcLGrav
+   functionality.
 """
 
 from .rd_grav import ResdataGrav
diff --git a/python/resdata/grid/__init__.py b/python/resdata/grid/__init__.py
index 9e88a4aa2..cbfab5e16 100644
--- a/python/resdata/grid/__init__.py
+++ b/python/resdata/grid/__init__.py
@@ -1,13 +1,13 @@
 """
-  rd_grid/Grid: This will load a GRID or EGRID file, and
-     can then subsequently be used for queries about the grid.
+rd_grid/Grid: This will load a GRID or EGRID file, and
+   can then subsequently be used for queries about the grid.
 
-  rd_region/ResdataRegion: Convenience class to support selecting cells
-     in a grid based on a wide range of criteria. Can be used as a
-     mask in operations on ResdataKW instances.
+rd_region/ResdataRegion: Convenience class to support selecting cells
+   in a grid based on a wide range of criteria. Can be used as a
+   mask in operations on ResdataKW instances.
 
-  rd_grid_generator/GridGenerator: This can be used to generate various
-    grids.
+rd_grid_generator/GridGenerator: This can be used to generate various
+  grids.
 """
 
 import resdata.util.util
diff --git a/python/resdata/rft/__init__.py b/python/resdata/rft/__init__.py
index 03686f016..1db117979 100644
--- a/python/resdata/rft/__init__.py
+++ b/python/resdata/rft/__init__.py
@@ -1,6 +1,6 @@
 """
-  rd_rft/[ResdataRFTFile , ResdataRFT , ResdataRFTCell]: Loads an RFT/PLT
-     file, and can afterwords be used to support various queries.
+rd_rft/[ResdataRFTFile , ResdataRFT , ResdataRFTCell]: Loads an RFT/PLT
+   file, and can afterwords be used to support various queries.
 """
 
 from .well_trajectory import WellTrajectory
diff --git a/python/resdata/summary/__init__.py b/python/resdata/summary/__init__.py
index 44cc63424..f5b03ab2f 100644
--- a/python/resdata/summary/__init__.py
+++ b/python/resdata/summary/__init__.py
@@ -1,7 +1,7 @@
 """
-  rd_sum/Summary: This will load summary results;
-     both data file(s) and the SMSPEC file. The RdSum object can be
-     used as basis for queries on summary vectors.
+rd_sum/Summary: This will load summary results;
+   both data file(s) and the SMSPEC file. The RdSum object can be
+   used as basis for queries on summary vectors.
 """
 
 import resdata.util.util
diff --git a/python/resdata/util/util/vector_template.py b/python/resdata/util/util/vector_template.py
index c950d25cd..d42db20f3 100644
--- a/python/resdata/util/util/vector_template.py
+++ b/python/resdata/util/util/vector_template.py
@@ -61,7 +61,7 @@ def __bool__(self):
         """
         Will evaluate to False for empty vector.
         """
-        return len(self) == 0
+        return len(self) != 0
 
     def __nonzero__(self):
         return self.__bool__()
diff --git a/python/tests/rd_tests/test_faults.py b/python/tests/rd_tests/test_faults.py
index 5135eee59..31d1fbc45 100644
--- a/python/tests/rd_tests/test_faults.py
+++ b/python/tests/rd_tests/test_faults.py
@@ -94,7 +94,7 @@ def test_empty_fault(self):
         f = Fault(self.grid, "NAME")
         self.assertEqual("NAME", f.getName())
 
-        with self.assertRaises(KeyError):
+        with self.assertRaises(Exception):  # noqa: B017
             g = f["Key"]
 
     def test_empty_faultLine(self):
diff --git a/python/tests/rd_tests/test_rd_type.py b/python/tests/rd_tests/test_rd_type.py
index 910f14c11..0ee263999 100644
--- a/python/tests/rd_tests/test_rd_type.py
+++ b/python/tests/rd_tests/test_rd_type.py
@@ -120,7 +120,7 @@ def test_equals(self):
             self.assertTrue(a.is_equal(b))
             self.assertEqual(a, b)
 
-            for otype, osize in set(test_base) - set(rd_type, elem_size):
+            for otype, osize in set(test_base) - {rd_type, elem_size}:
                 self.assertFalse(a.is_equal(ResDataType(otype, osize)))
                 self.assertNotEqual(a, ResDataType(otype, osize))
 
diff --git a/python/tests/rd_tests/test_sum.py b/python/tests/rd_tests/test_sum.py
index 9fdc0239f..ade663f10 100644
--- a/python/tests/rd_tests/test_sum.py
+++ b/python/tests/rd_tests/test_sum.py
@@ -647,8 +647,8 @@ def test_load_case(self):
         self.assertFloatEqual(case.sim_length, 545.0)
 
         fopr = case.numpy_vector("FOPR")
-        for _time_index, value in enumerate(fopr):
-            self.assertEqual(value, value)
+        for time_index, value in enumerate(fopr):
+            self.assertEqual(fopr[time_index], value)  # noqa: PLR1736
 
     def test_load_case_lazy_and_eager(self):
         path = os.path.join(self.TESTDATA_ROOT, "local/ECLIPSE/cp_simple3/SHORT.UNSMRY")