diff --git a/docs/conf.py b/docs/conf.py
index 1d759d6de..524da85e7 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -39,7 +39,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+import sys
 from unittest.mock import MagicMock
 
 # If extensions (or modules to document with autodoc) are in another directory,
diff --git a/pycsw/core/metadata.py b/pycsw/core/metadata.py
index 4c1cf5785..d12148736 100644
--- a/pycsw/core/metadata.py
+++ b/pycsw/core/metadata.py
@@ -242,7 +242,8 @@ def _parse_csw(context, repos, record, identifier, pagesize=10):
         md.getrecords2(typenames=csw_typenames, resulttype='hits',
                        outputschema=csw_outputschema)
         matches = md.results['matches']
-    except:  # this is a CSW, but server rejects query
+    except Exception:  # this is a CSW, but server rejects query
+        LOGGER.debug('CSW query failed')
         raise RuntimeError(md.response)
 
     if pagesize > matches:
@@ -1241,7 +1242,8 @@ def _parse_fgdc(context, repos, exml):
         try:
             tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
             _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
-        except:  # coordinates are corrupted, do not include
+        except Exception:
+            LOGGER.debug('Coordinates are corrupt')
             _set(context, recobj, 'pycsw:BoundingBox', None)
     else:
         _set(context, recobj, 'pycsw:BoundingBox', None)
@@ -1321,7 +1323,8 @@ def get_value_by_language(pt_group, language, pt_type='text'):
                                    data.geographic_bounding_box.east_bound_longitude,
                                    data.geographic_bounding_box.north_bound_latitude)
             _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
-        except:  # coordinates are corrupted, do not include
+        except Exception:
+            LOGGER.debug('Coordinates are corrupt')
             _set(context, recobj, 'pycsw:BoundingBox', None)
     else:
         _set(context, recobj, 'pycsw:BoundingBox', None)
@@ -1608,7 +1611,8 @@ def _parse_iso(context, repos, exml):
         try:
             tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
             _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
-        except:  # coordinates are corrupted, do not include
+        except Exception:
+            LOGGER.debug('Coordinates are corrupt')
             _set(context, recobj, 'pycsw:BoundingBox', None)
     else:
         _set(context, recobj, 'pycsw:BoundingBox', None)
@@ -1686,7 +1690,8 @@ def _parse_dc(context, repos, exml):
         try:
             tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
             _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
-        except:  # coordinates are corrupted, do not include
+        except Exception:
+            LOGGER.debug('Coordinates are corrupt')
             _set(context, recobj, 'pycsw:BoundingBox', None)
     else:
         _set(context, recobj, 'pycsw:BoundingBox', None)
diff --git a/pycsw/ogc/csw/csw2.py b/pycsw/ogc/csw/csw2.py
index 049af4adc..e3182b362 100644
--- a/pycsw/ogc/csw/csw2.py
+++ b/pycsw/ogc/csw/csw2.py
@@ -31,16 +31,10 @@
 # =================================================================
 
 import os
-import sys
-import cgi
-from urllib.parse import quote, unquote
-from io import StringIO
 from pycsw.core.etree import etree
-from pycsw import oaipmh, opensearch, sru
+from pycsw import opensearch
 from pycsw.ogc.csw.cql import cql2fes
-from pycsw.plugins.profiles import profile as pprofile
-import pycsw.plugins.outputschemas
-from pycsw.core import config, log, metadata, util
+from pycsw.core import metadata, util
 from pycsw.core.formats.fmt_json import xml2dict
 from pycsw.ogc.fes import fes1
 import logging
@@ -517,7 +511,8 @@ def getdomain(self):
                 self.parent.context.namespaces)).text = pname
                 try:
                     operation, parameter = pname.split('.')
-                except:
+                except Exception as err:
+                    LOGGER.debug(f'Cannot split pname: {err}')
                     return node
                 if (operation in self.parent.context.model['operations'].keys() and
                     parameter in
@@ -540,7 +535,8 @@ def getdomain(self):
                 else:  # it's a core queryable, map to internal typename model
                     try:
                         pname2 = self.parent.repository.queryables['_all'][pname]['dbcol']
-                    except:
+                    except Exception as err:
+                        LOGGER.debug(f'pname2 not found: {err}')
                         pname2 = pname
 
                 # decipher typename
@@ -780,7 +776,7 @@ def getrecords(self):
 
             try:
                 name, order = tmp.rsplit(':', 1)
-            except:
+            except Exception:
                 return self.exceptionreport('InvalidParameterValue',
                 'sortby', 'Invalid SortBy value: must be in the format\
                 propertyname:A or propertyname:D')
@@ -1989,7 +1985,8 @@ def exceptionreport(self, code, locator, text):
         try:
             language = self.parent.config['server'].get('language')
             ogc_schemas_base = self.parent.config['server'].get('ogc_schemas_base')
-        except:
+        except Exception:
+            LOGGER.debug('Dropping to default language and OGC schemas base')
             language = 'en-US'
             ogc_schemas_base = self.parent.context.ogc_schemas_base
 
@@ -2023,7 +2020,8 @@ def write_boundingbox(bbox, nsmap):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
 
         if len(bbox2) == 4:
diff --git a/pycsw/ogc/csw/csw3.py b/pycsw/ogc/csw/csw3.py
index 28bef1826..2438d3255 100644
--- a/pycsw/ogc/csw/csw3.py
+++ b/pycsw/ogc/csw/csw3.py
@@ -28,19 +28,12 @@
 #
 # =================================================================
 
-import json
 import os
-import sys
-import cgi
 from time import time
-from urllib.parse import quote, unquote
-from io import StringIO
 from pycsw.core.etree import etree
 from pycsw.ogc.csw.cql import cql2fes
-from pycsw import oaipmh, opensearch, sru
-from pycsw.plugins.profiles import profile as pprofile
-import pycsw.plugins.outputschemas
-from pycsw.core import config, log, metadata, util
+from pycsw import opensearch
+from pycsw.core import metadata, util
 from pycsw.core.formats.fmt_json import xml2dict
 from pycsw.ogc.fes import fes1, fes2
 import logging
@@ -113,7 +106,8 @@ def getcapabilities(self):
         try:
             updatesequence = \
             util.get_time_iso2unix(self.parent.repository.query_insert())
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Cannot set updatesequence: {err}')
             updatesequence = None
 
         node = etree.Element(util.nspath_eval('csw30:Capabilities',
@@ -512,7 +506,8 @@ def getdomain(self):
                 self.parent.context.namespaces)).text = pname
                 try:
                     operation, parameter = pname.split('.')
-                except:
+                except Exception as err:
+                    LOGGER.debug(f'pname2 not found: {err}')
                     return node
                 if (operation in self.parent.context.model['operations'] and
                     parameter in self.parent.context.model['operations'][operation]['parameters']):
@@ -534,8 +529,8 @@ def getdomain(self):
                 else:  # it's a core queryable, map to internal typename model
                     try:
                         pname2 = self.parent.repository.queryables['_all'][pname]['dbcol']
-                    except:
-                        pname2 = pname
+                    except Exception as err:
+                        LOGGER.debug(f'pname2 not found: {err}')
 
                 # decipher typename
                 dvtype = None
@@ -810,7 +805,7 @@ def getrecords(self):
 
             try:
                 name, order = tmp.rsplit(':', 1)
-            except:
+            except Exception:
                 return self.exceptionreport('InvalidParameterValue',
                 'sortby', 'Invalid SortBy value: must be in the format\
                 propertyname:A or propertyname:D')
@@ -2079,7 +2074,8 @@ def exceptionreport(self, code, locator, text):
         try:
             language = self.parent.config['server'].get('language')
             ogc_schemas_base = self.parent.config['server'].get('ogc_schemas_base')
-        except:
+        except Exception:
+            LOGGER.debug('Dropping to default language and OGC schemas base')
             language = 'en-US'
             ogc_schemas_base = self.parent.context.ogc_schemas_base
 
@@ -2157,7 +2153,8 @@ def write_boundingbox(bbox, nsmap):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
 
         if len(bbox2) == 4:
diff --git a/pycsw/ogc/fes/fes1.py b/pycsw/ogc/fes/fes1.py
index 2e443d84b..acb79e1e4 100644
--- a/pycsw/ogc/fes/fes1.py
+++ b/pycsw/ogc/fes/fes1.py
@@ -4,7 +4,7 @@
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #          Angelos Tzotsos <tzotsos@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 # Copyright (c) 2015 Angelos Tzotsos
 #
 # Permission is hereby granted, free of charge, to any person
@@ -416,7 +416,6 @@ def set_spatial_ranking(geometry):
             util.ranking_pass = True
             util.ranking_query_geometry = geometry.wkt
         elif geometry.type in ['LineString', 'Point']:
-            from shapely.geometry.base import BaseGeometry
             from shapely.geometry import box
             from shapely.wkt import loads,dumps
             ls = loads(geometry.wkt)
diff --git a/pycsw/ogc/fes/fes2.py b/pycsw/ogc/fes/fes2.py
index a29dcb946..7ce00d19b 100644
--- a/pycsw/ogc/fes/fes2.py
+++ b/pycsw/ogc/fes/fes2.py
@@ -4,7 +4,7 @@
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #          Angelos Tzotsos <tzotsos@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 # Copyright (c) 2015 Angelos Tzotsos
 #
 # Permission is hereby granted, free of charge, to any person
@@ -434,7 +434,6 @@ def set_spatial_ranking(geometry):
             util.ranking_pass = True
             util.ranking_query_geometry = geometry.wkt
         elif geometry.type in ['LineString', 'Point']:
-            from shapely.geometry.base import BaseGeometry
             from shapely.geometry import box
             from shapely.wkt import loads,dumps
             ls = loads(geometry.wkt)
diff --git a/pycsw/ogc/gml/gml3.py b/pycsw/ogc/gml/gml3.py
index f6edd4d16..ff51c2b8c 100644
--- a/pycsw/ogc/gml/gml3.py
+++ b/pycsw/ogc/gml/gml3.py
@@ -209,8 +209,9 @@ def transform(self, src, dest):
             proj_src = 'epsg:%s' % src
             proj_dst = 'epsg:%s' % dest
             transformer = Transformer.from_crs(proj_src, proj_dst, always_xy=True)
-        except:
-            raise RuntimeError('Invalid projection transformation')
+        except Exception as err:
+            msg = f'Invalid projection transformation: {err}'
+            raise RuntimeError(msg)
 
         geom = loads(self.wkt)
 
diff --git a/pycsw/ogc/gml/gml32.py b/pycsw/ogc/gml/gml32.py
index 2cc18d900..4fbb07011 100644
--- a/pycsw/ogc/gml/gml32.py
+++ b/pycsw/ogc/gml/gml32.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -28,7 +28,6 @@
 #
 # =================================================================
 
-from copy import deepcopy
 import logging
 from owslib import crs
 
@@ -213,8 +212,9 @@ def transform(self, src, dest):
             proj_src = 'epsg:%s' % src
             proj_dst = 'epsg:%s' % dest
             transformer = Transformer.from_crs(proj_src, proj_dst, always_xy=True)
-        except:
-            raise RuntimeError('Invalid projection transformation')
+        except Exception as err:
+            msg = f'Invalid projection transformation: {err}'
+            raise RuntimeError(msg)
 
         geom = loads(self.wkt)
 
diff --git a/pycsw/opensearch.py b/pycsw/opensearch.py
index 167ba3143..1b558a153 100644
--- a/pycsw/opensearch.py
+++ b/pycsw/opensearch.py
@@ -31,7 +31,6 @@
 # =================================================================
 
 import logging
-from urllib.parse import urlencode
 
 from pycsw.core import util
 from pycsw.core.etree import etree
diff --git a/pycsw/plugins/outputschemas/atom.py b/pycsw/plugins/outputschemas/atom.py
index 927901706..245296545 100644
--- a/pycsw/plugins/outputschemas/atom.py
+++ b/pycsw/plugins/outputschemas/atom.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -28,7 +28,6 @@
 #
 # =================================================================
 
-import os
 from pycsw.core import util
 from pycsw.core.etree import etree
 
@@ -132,7 +131,8 @@ def write_extent(bbox, nsmap):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
         where = etree.Element(util.nspath_eval('georss:where', NAMESPACES))
         envelope = etree.SubElement(where, util.nspath_eval('gml:Envelope', nsmap), srsName='http://www.opengis.net/def/crs/EPSG/0/4326')
diff --git a/pycsw/plugins/outputschemas/datacite.py b/pycsw/plugins/outputschemas/datacite.py
index da372c04b..b005d63a3 100644
--- a/pycsw/plugins/outputschemas/datacite.py
+++ b/pycsw/plugins/outputschemas/datacite.py
@@ -11,7 +11,7 @@
 #
 # This module intends to follow DataCite 4.3
 #
-# PyCSW  Copyright (C) 2015 Tom Kralidis
+# PyCSW  Copyright (C) 2024 Tom Kralidis
 # Schema Copyright (C) 2016 CERN
 # Schema Copyright (C) 2019 Caltech
 #
@@ -341,7 +341,8 @@ def write_record(result, esn, context, url=None):
     if bbox not in [None, '']:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
         bounds = etree.SubElement(node, util.nspath_eval('geoLocations', NAMESPACES))
         bound = etree.SubElement(bounds, util.nspath_eval('geoLocation', NAMESPACES))
diff --git a/pycsw/plugins/outputschemas/dif.py b/pycsw/plugins/outputschemas/dif.py
index 12c3a2c7e..7ffdcb622 100644
--- a/pycsw/plugins/outputschemas/dif.py
+++ b/pycsw/plugins/outputschemas/dif.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -198,12 +198,11 @@ def write_record(result, esn, context, url=None):
 def write_extent(bbox, nsmap):
     ''' Generate BBOX extent '''
 
-    from shapely.wkt import loads
-
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
         extent = etree.Element(util.nspath_eval('dif:Spatial_Coverage', nsmap))
         etree.SubElement(extent, util.nspath_eval('dif:Southernmost_Latitude', nsmap)).text = str(bbox2[1])
diff --git a/pycsw/plugins/outputschemas/fgdc.py b/pycsw/plugins/outputschemas/fgdc.py
index 1d43d07d1..bd0dccc49 100644
--- a/pycsw/plugins/outputschemas/fgdc.py
+++ b/pycsw/plugins/outputschemas/fgdc.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -166,7 +166,8 @@ def write_extent(bbox):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
 
         spdom = etree.Element('spdom')
diff --git a/pycsw/plugins/outputschemas/gm03.py b/pycsw/plugins/outputschemas/gm03.py
index 9cfeeabef..bb207caaa 100644
--- a/pycsw/plugins/outputschemas/gm03.py
+++ b/pycsw/plugins/outputschemas/gm03.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -228,7 +228,8 @@ def write_extent(bbox, nsmap):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
         bounding_box = etree.Element(util.nspath_eval('gm03:GM03_2_1Core.Core.EX_GeographicBoundingBox', NAMESPACES))
         etree.SubElement(bounding_box, util.nspath_eval('gm03:northBoundLatitude', nsmap)).text = str(bbox2[3])
diff --git a/pycsw/plugins/profiles/apiso/apiso.py b/pycsw/plugins/profiles/apiso/apiso.py
index 03b507feb..c95d045aa 100644
--- a/pycsw/plugins/profiles/apiso/apiso.py
+++ b/pycsw/plugins/profiles/apiso/apiso.py
@@ -31,7 +31,7 @@
 # =================================================================
 
 import os
-from pycsw.core import config, util
+from pycsw.core import util
 from pycsw.core.etree import etree
 from pycsw.plugins.profiles import profile
 
@@ -707,7 +707,8 @@ def write_extent(bbox, nsmap):
     if bbox is not None:
         try:
             bbox2 = util.wkt2geom(bbox)
-        except:
+        except Exception as err:
+            LOGGER.debug(f'Geometry parsing error: {err}')
             return None
         extent = etree.Element(util.nspath_eval('gmd:extent', nsmap))
         ex_extent = etree.SubElement(extent, util.nspath_eval('gmd:EX_Extent', nsmap))
diff --git a/pycsw/plugins/profiles/ebrim/ebrim.py b/pycsw/plugins/profiles/ebrim/ebrim.py
index fb63ed100..53ca832c1 100644
--- a/pycsw/plugins/profiles/ebrim/ebrim.py
+++ b/pycsw/plugins/profiles/ebrim/ebrim.py
@@ -30,7 +30,7 @@
 
 import os
 from pycsw.core.etree import etree
-from pycsw.core import config, util
+from pycsw.core import util
 from pycsw.ogc.csw.csw2 import write_boundingbox
 from pycsw.plugins.profiles import profile
 
diff --git a/pycsw/plugins/repository/odc/odc.py b/pycsw/plugins/repository/odc/odc.py
index c3d6a9592..7a7af2b3f 100644
--- a/pycsw/plugins/repository/odc/odc.py
+++ b/pycsw/plugins/repository/odc/odc.py
@@ -3,7 +3,7 @@
 #
 # Authors: Tom Kralidis <tomkralidis@gmail.com>
 #
-# Copyright (c) 2015 Tom Kralidis
+# Copyright (c) 2024 Tom Kralidis
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -28,11 +28,8 @@
 #
 # =================================================================
 
-import os, sys
-
-from django.db import models
 from django.db import connection
-from django.db.models import Avg, Max, Min, Count
+from django.db.models import Max, Min, Count
 from django.conf import settings
 
 from pycsw.core import repository, util
@@ -109,7 +106,6 @@ def query_domain(self, domain, typenames, domainquerytype='list',
 
     def query_insert(self, direction='max'):
         ''' Query to get latest (default) or earliest update to repository '''
-        from datetime import datetime
         if direction == 'min':
             return Resource.objects.aggregate(
                 Min('last_updated'))['last_updated__min'].strftime('%Y-%m-%dT%H:%M:%SZ')
diff --git a/pycsw/server.py b/pycsw/server.py
index cb3fad13c..917525240 100644
--- a/pycsw/server.py
+++ b/pycsw/server.py
@@ -392,8 +392,8 @@ def dispatch(self, writer=sys.stdout, write_headers=True):
                         self.repository = rs_cls(self.context, repo_filter)
                         LOGGER.debug('Custom repository %s loaded (%s)', rs, self.repository.dbtype)
                         connection_done = True
-                    except:
-                        LOGGER.debug(f'Repository not loaded retry connection {max_attempts}')
+                    except Exception as err:
+                        LOGGER.debug(f'Repository not loaded retry connection {max_attempts}: {err}')
                         max_attempts += 1
             except Exception as err:
                 msg = 'Could not load custom repository %s: %s' % (rs, err)
@@ -422,8 +422,8 @@ def dispatch(self, writer=sys.stdout, write_headers=True):
                         LOGGER.debug(
                             'Repository loaded (local): %s.' % self.repository.dbtype)
                         connection_done = True
-                    except:
-                        LOGGER.debug(f'Repository not loaded retry connection {max_attempts}')
+                    except Exception:
+                        LOGGER.debug(f'Repository not loaded retry connection {max_attempts}: {err}')
                         max_attempts += 1
             except Exception as err:
                 msg = 'Could not load repository (local): %s' % err
@@ -814,7 +814,8 @@ def _cql_update_queryables_mappings(self, cql, mappings):
             for key in mappings.keys():
                 try:
                     cql = cql.replace(key, mappings[key]['dbcol'])
-                except:
+                except KeyError:
+                    LOGGER.debug('Setting without dbcol key')
                     cql = cql.replace(key, mappings[key])
             LOGGER.debug('Interpolated CQL text = %s.', cql)
             return cql