Create a Personal Knowledge Base That Searches Notes Instantly in Python

import json
import re
import sys

class PersonalKnowledgeBase:
    def __init__(self, file_path="kb_notes.json"):
        self.file_path = file_path
        self.notes = self._load_notes()

    def _load_notes(self):
        try:
            with open(self.file_path, "r") as f:
                return json.load(f)
        except (FileNotFoundError, json.JSONDecodeError):
            return {}

    def _save_notes(self):
        with open(self.file_path, "w") as f:
            json.dump(self.notes, f, indent=2)

    def add_note(self, title, content):
        self.notes[title] = content
        self._save_notes()

    def search(self, query):
        query_lower = query.lower()
        results = {}
        for title, content in self.notes.items():
            if (query_lower in title.lower() or 
                query_lower in content.lower()):
                results[title] = content
        return results

if __name__ == "__main__":
    kb = PersonalKnowledgeBase()
    kb.add_note("Python tips", "Use pathlib for file paths, not os.path.")
    kb.add_note("Flask setup", "Install Flask with pip, define routes.")
    kb.add_note("Git commands", "git commit -m, git push origin main")
    
    query = "git"
    found = kb.search(query)
    if found:
        print(f"Found {len(found)} note(s) for '{query}':")
        for title, content in found.items():
            print(f"  {title}: {content}")
    else:
        print(f"No notes found for '{query}'.")