diff --git a/pyminer/packages/code_editor/code_handlers/base_handler.py b/pyminer/packages/code_editor/code_handlers/base_handler.py
index 6de71f2d399f93af5ae766ff407f276f5bc1fa7b..e8b3dc93d2013ea9768760d7eb56d986caed29e8 100644
--- a/pyminer/packages/code_editor/code_handlers/base_handler.py
+++ b/pyminer/packages/code_editor/code_handlers/base_handler.py
@@ -68,7 +68,8 @@ class BaseHandler(CodeEditorBaseObject):
             position: 游标的位置，是一个整数，而不是行列号
             selection_range: 选区的位置，是一对整数，表示起止位置，而不是行列号
         """
-        if (a := self.analyzer) is not None:
+        a = self.analyzer
+        if a is not None:
             if (code, position, selection_range) == (a.code, a.cursor, a.selection_range):
                 return
         self.analyzer = self.analyzer_class(code, position, selection_range)
diff --git a/pyminer/packages/code_editor/widgets/text_edit/base_text_edit.py b/pyminer/packages/code_editor/widgets/text_edit/base_text_edit.py
index 9451721b3611656794d5303b88e5dc5f39696fa3..1aadd23e65ab6181c023da721c122e404fc6aa06 100644
--- a/pyminer/packages/code_editor/widgets/text_edit/base_text_edit.py
+++ b/pyminer/packages/code_editor/widgets/text_edit/base_text_edit.py
@@ -8,13 +8,13 @@ from itertools import groupby
 from queue import Queue
 from typing import Callable, Tuple, Dict, List, TYPE_CHECKING, Type, Any
 
+import utils
 from PySide2.QtCore import SignalInstance, Signal, Qt, QTimer, QModelIndex, QUrl, QRect, QPoint
 from PySide2.QtGui import QFocusEvent, QTextCursor, QMouseEvent, QKeyEvent, QDragEnterEvent, QDropEvent, QPainter, \
     QColor, QTextFormat, QFontDatabase, QFont, QTextDocument
 from PySide2.QtWidgets import QPlainTextEdit, QWidget, QApplication, QTextEdit, QLabel, QMenu, QAction
 from jedi.api.classes import Completion as CompletionResult
 
-import utils
 from .line_number_area import QLineNumberArea
 from ..auto_complete_dropdown.base_auto_complete_dropdown import BaseAutoCompleteDropdownWidget
 from ...code_handlers.base_handler import BaseAnalyzer, BaseHandler
@@ -493,14 +493,18 @@ class PMBaseCodeEdit(CodeEditorBaseObject, QPlainTextEdit):
         #  即分别通过event.text()和event.key()+event.modifier()进行处理
         text, key, modifiers = event.text(), event.key(), int(event.modifiers())
         no_modifier = modifiers == Qt.NoModifier
-        if no_modifier and (callback := self.key_press_mapping.get(text, None)) is not None:
-            callback(event)
-        elif no_modifier and (callback := self.key_press_mapping.get(key, None)) is not None:
-            callback(event)
-        elif (callback := self.key_press_mapping.get((key, modifiers), None)) is not None:
-            callback(event)
+        callback_with_text = self.key_press_mapping.get(text, None)
+        callback_with_key = self.key_press_mapping.get(key, None)
+        callback_with_modifiers = self.key_press_mapping.get((key, modifiers), None)
+        if no_modifier and callback_with_text is not None:
+            callback = callback_with_text
+        elif no_modifier and callback_with_key is not None:
+            callback = callback_with_key
+        elif callback_with_modifiers is not None:
+            callback = callback_with_modifiers
         else:
-            super().keyPressEvent(event)
+            callback = super().keyPressEvent
+        callback(event)
         self.update_handler_code()
 
     def on_left_parenthesis(self, event: QKeyEvent):
diff --git a/pyminer/utils/dev/system.py b/pyminer/utils/dev/system.py
index 9f866a558483c12a6a8d49acf3ab653be428b3a6..cb9ff30538cd5e0d8eccec255ae693bce9528e3b 100644
--- a/pyminer/utils/dev/system.py
+++ b/pyminer/utils/dev/system.py
@@ -8,11 +8,13 @@ import chardet
 def system(*args: Union[str, Path]):
     args = [str(arg) for arg in args]
     result = subprocess.run(args=args, capture_output=True)
-    if stdout := result.stdout:
+    stdout = result.stdout
+    if stdout:
         print('Out: ')
         stdout = stdout.decode(chardet.detect(result.stdout)['encoding'])
         print(stdout)
-    if stderr := result.stderr:
+    stderr = result.stderr
+    if stderr:
         print('Error: ')
         stderr = stderr.decode(chardet.detect(result.stderr)['encoding'])
         print(stderr)