A desktop app designed to help you master keyboard shortcuts

• Add, edit, and delete keyboard shortcuts
• Organize shortcuts by category
• Search and filter shortcuts
• Persistent storage of your shortcuts
• Quiz difficulty levels
• Right click on list element to view delete button

• Python
• Tkinter

1. clone repo
   git clone https://github.com/mzums/keysnap
2. run
   python main.py

1. __slots__ in classes

   class ShortcutManager:
        __slots__ = ('filename', '_shortcuts', '_categories')
   • replaces dynamic __dict__ with fixed attribute lists

2. Memory pooling for categories

   if category not in self._categories:
        self._categories.append(category)
   
   category_idx = self._categories.index(category)
   • stores category strings once and reuses them

3. Tuple-based data storage

   self._shortcuts.append((shortcut, description, category_idx))
   • more memory-efficient than dictionaries/objects

4. Binary storage with fixed-size records

   f.write(struct.pack('II', len(self._shortcuts), len(self._categories)))
   • more compact than text formats (JSON/XML)

5. Lazy loading for quiz data

   def refresh_available(self):
        self.available_shortcuts = self.app.manager.get_shortcuts()
   • only loads quiz data when needed

6. Selective UI updates

   self.app.list_frame.refresh_list()
   
   self.app.quiz_frame.refresh_available()
   • updates only necessary components

7. Efficient string handling

   self.shortcut_var = tk.StringVar()
   • uses Tkinter's optimized string management

8. Pre-display data filtering

   for item in self.app.manager.get_shortcuts(category):
        if search_term in shortcut.lower()...
   • avoids storing invisible items in GUI widgets