diff --git a/src/plugins/logfile/filterwidget.py b/src/plugins/logfile/filterwidget.py
index f3d7925..ece6ec0 100644
--- a/src/plugins/logfile/filterwidget.py
+++ b/src/plugins/logfile/filterwidget.py
@@ -8,7 +8,7 @@ from typing import Optional, Callable
 from PySide6.QtCore import QRunnable, QThreadPool, Signal
 from PySide6.QtGui import QIcon
 from PySide6.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QCheckBox, QPushButton, QComboBox, \
-    QSizePolicy, QProgressBar, QMenu, QMenuBar
+    QSizePolicy, QProgressBar
 
 from src.plugins.domain.raction import RAction
 from src.plugins.logfile.preprocesslineshook import PreProcessLinesHook
@@ -71,13 +71,13 @@ class FilterTask(QRunnable):
                     with open(self.filter_model.get_file(), "w+b") as target:
                         line_count = 0
                         lines_written = 0
-                        while l := source.readline():
+                        while line_encoded := source.readline():
                             line_count = line_count + 1
-                            line = l.decode("utf8", errors="ignore")
+                            line = line_encoded.decode("utf8", errors="ignore")
 
                             if self.regex.findall(line):
                                 lines_written = lines_written + 1
-                                source_line_offset = source.tell() - len(l)
+                                source_line_offset = source.tell() - len(line_encoded)
                                 target_line_offset = target.tell()
                                 for listener in self.filter_match_found_listeners:
                                     listener(target_line_offset, source_line_offset)
@@ -177,9 +177,9 @@ class FilterWidget(QWidget):
         filter_bar.layout.addWidget(self.ignore_case)
         filter_bar.layout.addWidget(self.is_regex)
 
-        (handle, self.tmpfilename) = tempfile.mkstemp()
+        (handle, self.tmp_filename) = tempfile.mkstemp()
         os.close(handle)
-        self.filter_model = LogFileModel(self.tmpfilename, self.source_model.settings)
+        self.filter_model = LogFileModel(self.tmp_filename, self.source_model.settings)
         self.hits_view = BigText(self.filter_model)
 
         self.layout.addWidget(filter_bar)
@@ -221,9 +221,8 @@ class FilterWidget(QWidget):
             self._reload_save_queries()
 
     def destruct(self):
-        # print("cleanup: ", self.tmpfilename)
         self._cancel_search()
-        os.remove(self.tmpfilename)
+        os.remove(self.tmp_filename)
 
     def _cancel_search(self):
         if self.filter_task: