Fixed following SonarQube code smells:

1) Remove this useless assignment to a variable.
2) Remove the unused local variable.

web/pgadmin/__init__.py

@@ -91,7 +91,7 @@ class PgAdmin(Flask):
                 for key in list(module.__dict__.keys()):
                     if isinstance(module.__dict__[key], PgAdminModule):
                         yield module.__dict__[key]
-        except Exception as _:
+        except Exception:
             return []
 
     @property
@@ -372,7 +372,7 @@ def create_app(app_name=None):
             os.environ[
                 'CORRUPTED_DB_BACKUP_FILE'] = backup_file_name
             app.logger.info('Database migration completed.')
-        except Exception as e:
+        except Exception:
             app.logger.error('Database migration failed')
             app.logger.error(traceback.format_exc())
             raise RuntimeError('Migration failed')
@@ -384,7 +384,7 @@ def create_app(app_name=None):
         try:
             db_upgrade(app)
             os.environ['CORRUPTED_DB_BACKUP_FILE'] = ''
-        except Exception as e:
+        except Exception:
             backup_db_file()
 
         # check all tables are present in the db.
@@ -785,11 +785,10 @@ def create_app(app_name=None):
                 )
                 abort(401)
             login_user(user)
-        elif config.SERVER_MODE and \
-                not current_user.is_authenticated and \
-                request.endpoint in ('redirects.index', 'security.login'):
-            if app.PGADMIN_EXTERNAL_AUTH_SOURCE in [KERBEROS, WEBSERVER]:
-                return authenticate.login()
+        elif config.SERVER_MODE and not current_user.is_authenticated and \
+                request.endpoint in ('redirects.index', 'security.login') and \
+                app.PGADMIN_EXTERNAL_AUTH_SOURCE in [KERBEROS, WEBSERVER]:
+            return authenticate.login()
         # if the server is restarted the in memory key will be lost
         # but the user session may still be active. Logout the user
         # to get the key again when login

web/pgadmin/authenticate/webserver.py

@@ -91,7 +91,7 @@ class WebserverAuthentication(BaseAuthentication):
                 "Webserver authenticate failed.")
 
         session['pass_enc_key'] = ''.join(
-            (random.choice(string.ascii_lowercase) for x in range(10)))
+            (random.choice(string.ascii_lowercase) for _ in range(10)))
         useremail = request.environ.get('mail')
         if not useremail:
             useremail = ''

web/pgadmin/browser/server_groups/servers/roles/__init__.py

@@ -1296,9 +1296,6 @@ WHERE
         )
         status, res = conn.execute_scalar(SQL)
 
-        if not status:
-            return status, res
-
         return status, res
 
     @check_precondition()
@@ -1325,7 +1322,7 @@ WHERE
                 for k, v in rargs.items():
                     try:
                         data[k] = json.loads(v, encoding='utf-8')
-                    except ValueError as ve:
+                    except ValueError:
                         data[k] = v
 
             required_args = ['role_op', 'did', 'old_role_name',

web/pgadmin/browser/server_groups/servers/utils.py

@@ -266,7 +266,7 @@ def remove_saved_passwords(user_id):
             .filter(Server.user_id == user_id) \
             .update({Server.password: None, Server.tunnel_password: None})
         db.session.commit()
-    except Exception as _:
+    except Exception:
         db.session.rollback()
         raise
 

web/pgadmin/feature_tests/pg_utilities_backup_restore_test.py

@@ -161,7 +161,7 @@ class PGUtilitiesBackupFeatureTest(BaseFeatureTest):
             test_gui_helper.close_process_watcher(self)
             test_gui_helper.close_bgprocess_popup(self)
             self.page.remove_server(self.server)
-        except Exception as e:
+        except Exception:
             print("PGUtilitiesBackupFeatureTest - "
                   "Exception occurred in after method")
         finally:
@@ -221,7 +221,6 @@ class PGUtilitiesBackupFeatureTest(BaseFeatureTest):
                     click = False
             except Exception:
                 retry -= 1
-                pass
 
     def initiate_restore(self):
         tools_menu = self.driver.find_element(
@@ -257,7 +256,6 @@ class PGUtilitiesBackupFeatureTest(BaseFeatureTest):
                     click = False
             except Exception:
                 retry -= 1
-                pass
 
     def _check_escaped_characters(self, source_code, string_to_find, source):
         # For XSS we need to search against element's html code

web/pgadmin/feature_tests/pg_utilities_maintenance_test.py

@@ -170,7 +170,7 @@ class PGUtilitiesMaintenanceFeatureTest(BaseFeatureTest):
             test_utils.delete_table(self.server, self.database_name,
                                     self.table_name)
             self.page.remove_server(self.server)
-        except Exception as e:
+        except Exception:
             print("PGUtilitiesMaintenanceFeatureTest - "
                   "Exception occurred in after method")
         finally:

web/pgadmin/misc/file_manager/__init__.py

@@ -985,7 +985,7 @@ class Filemanager(object):
             try:
                 # Check if the new file is inside the users directory
                 pathlib.Path(new_name).relative_to(the_dir)
-            except ValueError as _:
+            except ValueError:
                 return self.ERROR_NOT_ALLOWED
 
             with open(new_name, 'wb') as f:

web/pgadmin/misc/themes/__init__.py

@@ -21,7 +21,7 @@ def get_all_themes():
 
     try:
         all_themes.update(json.load(open(theme_file_path)))
-    except Exception as _:
+    except Exception:
         pass
 
     return all_themes

web/pgadmin/static/js/SchemaView/index.jsx

@@ -8,8 +8,7 @@
 //////////////////////////////////////////////////////////////
 
 import React, { useCallback, useEffect, useMemo, useReducer, useRef, useState } from 'react';
-import { Box, makeStyles } from '@material-ui/core';
-import {Accordion, AccordionSummary, AccordionDetails} from '@material-ui/core';
+import { Box, makeStyles, Accordion, AccordionSummary, AccordionDetails} from '@material-ui/core';
 import ExpandMoreIcon from '@material-ui/icons/ExpandMore';
 import SaveIcon from '@material-ui/icons/Save';
 import PublishIcon from '@material-ui/icons/Publish';
@@ -323,14 +322,13 @@ const getDepChange = (currPath, newState, oldState, action)=>{
 
 const getDeferredDepChange = (currPath, newState, oldState, action)=>{
   if(action.deferredDepChange) {
-    let deferredPromiseList = action.deferredDepChange(currPath, newState, {
+    return action.deferredDepChange(currPath, newState, {
       type: action.type,
       path: action.path,
       value: action.value,
       depChange: action.depChange,
       oldState: _.cloneDeep(oldState),
     });
-    return deferredPromiseList;
   }
 };
 
@@ -821,7 +819,6 @@ function SchemaPropertiesView({
     });
   }, [getInitData]);
 
-  let fullTabs = [];
 
   /* A simple loop to get all the controls for the fields */
   schema.fields.forEach((field)=>{
@@ -831,10 +828,8 @@ function SchemaPropertiesView({
 
     if(field.isFullTab) {
       tabsClassname[group] = classes.noPadding;
-      fullTabs.push(group);
     }
 
-    readonly = true;
     if(modeSupported) {
       group = groupLabels[group] || group || defaultTab;
       if(field.helpMessageMode && field.helpMessageMode.indexOf(viewHelperProps.mode) == -1) {

web/pgadmin/tools/erd/tests/test_tables.py

@@ -52,7 +52,7 @@ class ERDTables(BaseTestGenerator):
                 tables_utils.create_table(self.server, self.db_name, tab[0],
                                           tab[1])
                 connection.close()
-        except Exception as _:
+        except Exception:
             self.dropDB()
             raise
 

web/pgadmin/tools/import_export_servers/__init__.py

@@ -174,7 +174,7 @@ def load_servers():
 
             for item in groups:
                 all_servers.append(groups[item])
-        except Exception as e:
+        except Exception:
             return internal_server_error(
                 _('Unable to load the specified file.'))
     else:

web/pgadmin/tools/psql/__init__.py

@@ -492,7 +492,7 @@ def socket_input(data):
                 enter_key_press(data)
             else:
                 other_key_press(data)
-    except Exception as e:
+    except Exception:
         # Delete socket id from sessions.
         # request.sid: refer request.sid as socket id.
         sio.emit('pty-output',

web/pgadmin/tools/sqleditor/static/js/sqleditor.js

@@ -765,7 +765,6 @@ define('tools.querytool', [
       /* If sql editor is in a new tab, event fired is not available
        * instead, a poller is set up who will check
        */
-      //var browser_qt_preferences = pgBrowser.get_preferences_for_module('browser');
       var open_new_tab_qt = self.browser_preferences.new_browser_tab_open;
       if(open_new_tab_qt && open_new_tab_qt.includes('qt')) {
         pgBrowser.bind_beforeunload();
@@ -2010,7 +2009,7 @@ define('tools.querytool', [
               method: 'DELETE',
               contentType: 'application/json',
             })
-              .done(function() {})
+              .done(function() { /* This is intentional */ })
               .fail(function() {
               /* history clear fail should not affect query tool */
               });
@@ -2437,7 +2436,7 @@ define('tools.querytool', [
                   },
                 };
               },
-              build:function() {},
+              build:function() {/* */},
               settings:{
                 message: null,
               },
@@ -2517,7 +2516,7 @@ define('tools.querytool', [
                 function() {
                   self.initTransaction();
                 },
-                function(error) {
+                function() {
                   pgBrowser.Events.trigger(
                     'pgadmin:query_tool:connected_fail:' + self.transId, xhr, error
                   );
@@ -3430,8 +3429,8 @@ define('tools.querytool', [
           contentType: 'application/json',
           data: JSON.stringify(history_entry),
         })
-          .done(function() {})
-          .fail(function() {});
+          .done(function() { /* This is intentional */ })
+          .fail(function() { /* This is intentional */ });
 
         self.gridView.history_collection.add(history_entry);
       },
@@ -5159,7 +5158,7 @@ define('tools.querytool', [
         if(data.data_obj.db_id == db_did && !_.isEqual(db_name, data.data_obj.db_name)) {
 
           var message = `Current database has been moved or renamed to ${data.data_obj.db_name}. Click on the OK button to refresh the database name.`,
-            title = self.url_params.title;
+            title = '';
 
           if(self.is_query_tool) {// for query tool
 

web/pgadmin/tools/sqleditor/utils/save_changed_data.py

@@ -271,7 +271,7 @@ def save_changed_data(changed_data, columns_info, conn, command_obj,
                     else:
                         status, res = conn.execute_void(
                             item['sql'], item['data'])
-                except Exception as _:
+                except Exception:
                     failure_handle(res, item.get('row_id', 0))
                     raise
 

web/pgadmin/utils/master_password.py

@@ -57,7 +57,7 @@ def validate_master_password(password):
             return False
         else:
             return True
-    except Exception as _:
+    except Exception:
         False
 
 
@@ -79,7 +79,7 @@ def set_masterpass_check_text(password, clear=False):
             .update({User.masterpass_check: masterpass_check})
         db.session.commit()
 
-    except Exception as _:
+    except Exception:
         db.session.rollback()
         raise
 

web/regression/feature_utils/pgadmin_page.py

@@ -1272,7 +1272,7 @@ class PgadminPage:
                     lambda d: d.find_element(By.XPATH, xpath))
                 f_scroll, r_scroll = 0, 0
                 return ele
-            except (TimeoutException, NoSuchElementException) as e:
+            except (TimeoutException, NoSuchElementException):
                 tree_height = int((self.driver.find_element(
                     By.XPATH, "//div[@class='file-tree']/div[1]/div/div").
                     value_of_css_property('height')).split("px")[0])

web/regression/python_test_utils/test_utils.py

@@ -1796,7 +1796,7 @@ def module_patch(*args):
             patch.getter = lambda: imported
             patch.attribute = '.'.join(components[i:])
             return patch
-        except Exception as exc:
+        except Exception:
             pass
 
     # did not find a module, just return the default mock