AttributeError: объект «список» не имеет атрибута «tree_dict» в PySimpleGUI

Ниже приведен код PySimpleGUI для создания многоязычного словаря, в который я могу добавлять записи для каждого слова на разных языках, а также иметь возможность поиска по языку. К сожалению, я получил следующую ошибку:

AttributeError: объект «список» не имеет атрибута «tree_dict»

Как я могу это исправить?

import sqlite3
import PySimpleGUI as sg

# Create connection to SQLite database
conn = sqlite3.connect('Data_Enteries.db')
c = conn.cursor()

# Create table if it doesn't exist
c.execute('''CREATE TABLE IF NOT EXISTS dictionary
             (id INTEGER PRIMARY KEY,
              English TEXT,
              French TEXT,
              Spanish TEXT,
              Chinese TEXT,
              Swedish TEXT,
              Turkish TEXT)''')
conn.commit()

# Create PySimpleGUI layout
layout = [[sg.Text('Enter word to search: '), sg.InputText(key='search'), 
           sg.Button('Search')],
          [sg.Tree(data=[], headings=['English', 'French', 'Spanish', 'Chinese', 'Swedish', 
            'Turkish'], key='treeview', col_widths=[20]*6)]]

# Create PySimpleGUI window
window = sg.Window('Multilanguage Dictionary', layout)

# Function to retrieve data from database
def search_database(word):
    # Execute SELECT query
    c.execute('''SELECT * FROM dictionary
                 WHERE English = ? OR
                       French = ? OR
                       Spanish = ? OR
                       Chinese = ? OR
                       Swedish = ? OR
                       Turkish = ?''', (word, word, word, word, word, word))
    results = c.fetchall()
    # Convert results to PySimpleGUI treeview data format
    data = []
    for row in results:
        data.append([row[1], row[2], row[3], row[4], row[5], row[6]])
    return data

# Loop to handle PySimpleGUI events
while True:
    event, values = window.read()
    if event == sg.WINDOW_CLOSED:
        break
    if event == 'Search':
        search_word = values['search']
        tree_data = search_database(search_word)
        window['treeview'].update(values=tree_data)

# Close PySimpleGUI window and SQLite database connection
conn.close()
window.close()

Выслеживать:

C:\UsersUserName\Desktop>MultiLangPSG.py
Traceback (most recent call last):
  File "C:\UsersUserName\Desktop\MultiLangPSG.py", line 47, in <module>
    event, values = window.read()
                    ^^^^^^^^^^^^^
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 10075, in read
    results = self._read(timeout=timeout, timeout_key=timeout_key)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 10146, in _read
    self._Show()
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 9886, in _Show
    StartupTK(self)
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 16866, in StartupTK
    _convert_window_to_tk(window)
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 16753, in _convert_window_to_tk
    PackFormIntoFrame(window, master, window)
  File "C:\UsersUserName\AppData\Local\Programs\Python\Python311\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 16402, in PackFormIntoFrame
    for key, node in element.TreeData.tree_dict.items():
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'tree_dict'