from flask import Flask, jsonify, request

@app.errorhandler(404)
def bad_method(error=None):
    jsonData = request.get_json(cache=False)
    id = jsonData['id']
    message = {"jsonrpc": "2.0", "error": {"code": -32601, "message": "Method not found"}, "id": id}
    resp = jsonify(message)
    return resp