Fix mypy job, fix issues detected by mypy

.github/workflows/mypy.yml

@@ -29,11 +29,13 b' jobs:'
         pip install mypy pyflakes flake8
     - name: Lint with mypy
       run: |
+        set -e
         mypy -p IPython.terminal
         mypy -p IPython.core.magics
         mypy -p IPython.core.guarded_eval
         mypy -p IPython.core.completer
     - name: Lint with pyflakes
       run: |
+        set -e
         flake8  IPython/core/magics/script.py
         flake8  IPython/core/magics/packaging.py

IPython/terminal/shortcuts/__init__.py

@@ -11,7 +11,7 b' import signal'
 import sys
 import re
 import os
-from typing import Callable
+from typing import Callable, Dict, Union
 
 
 from prompt_toolkit.application.current import get_app
@@ -143,10 +143,10 b' def create_ipython_shortcuts(shell, for_all_platforms: bool = False):'
         return paired
 
     focused_insert = (vi_insert_mode | emacs_insert_mode) & has_focus(DEFAULT_BUFFER)
-    _preceding_text_cache = {}
-    _following_text_cache = {}
+    _preceding_text_cache: Dict[Union[str, Callable], Condition] = {}
+    _following_text_cache: Dict[Union[str, Callable], Condition] = {}
 
-    def preceding_text(pattern):
+    def preceding_text(pattern: Union[str, Callable]):
         if pattern in _preceding_text_cache:
             return _preceding_text_cache[pattern]
 
@@ -383,8 +383,8 b' def create_ipython_shortcuts(shell, for_all_platforms: bool = False):'
         self._input_mode = mode
 
     if shell.editing_mode == "vi" and shell.modal_cursor:
-        ViState._input_mode = InputMode.INSERT
-        ViState.input_mode = property(get_input_mode, set_input_mode)
+        ViState._input_mode = InputMode.INSERT  # type: ignore
+        ViState.input_mode = property(get_input_mode, set_input_mode)  # type: ignore
 
     return kb
 

IPython/terminal/shortcuts/auto_match.py

@@ -50,7 +50,7 b' def raw_string_parenthesis(event: KeyPressEvent):'
         r".*(r|R)[\"'](-*)",
         event.current_buffer.document.current_line_before_cursor,
     )
-    dashes = matches.group(2) or ""
+    dashes = matches.group(2) if matches else ""
     event.current_buffer.insert_text("()" + dashes)
     event.current_buffer.cursor_left(len(dashes) + 1)
 
@@ -61,7 +61,7 b' def raw_string_bracket(event: KeyPressEvent):'
         r".*(r|R)[\"'](-*)",
         event.current_buffer.document.current_line_before_cursor,
     )
-    dashes = matches.group(2) or ""
+    dashes = matches.group(2) if matches else ""
     event.current_buffer.insert_text("[]" + dashes)
     event.current_buffer.cursor_left(len(dashes) + 1)
 
@@ -72,7 +72,7 b' def raw_string_braces(event: KeyPressEvent):'
         r".*(r|R)[\"'](-*)",
         event.current_buffer.document.current_line_before_cursor,
     )
-    dashes = matches.group(2) or ""
+    dashes = matches.group(2) if matches else ""
     event.current_buffer.insert_text("{}" + dashes)
     event.current_buffer.cursor_left(len(dashes) + 1)