如何修复PySimpleGUI中的TypeError: cannot unpack non-iterable Button object错误

报错信息 #

Traceback (most recent call last):
  File "D:\Python\Lavoro.py", line 89, in <module>
    event = window.read()
            ^^^^^^^^^^^^^
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 10075, in read
    results = self._read(timeout=timeout, timeout_key=timeout_key)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 10146, in _read
    self._Show()
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 9886, in _Show
    StartupTK(self)
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 16866, in StartupTK
    _convert_window_to_tk(window)
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 16753, in _convert_window_to_tk
    PackFormIntoFrame(window, master, window)
  File "D:\Python\venv\Lib\site-packages\PySimpleGUI\PySimpleGUI.py", line 14943, in PackFormIntoFrame
    width, height = element_size
    ^^^^^^^^^^^^^
TypeError: cannot unpack non-iterable Button object

问题代码 #

layout = [ [sg.Text('???')],
           [sg.Text('???')],
           [sg.Text('???', sg.Button('???'))],
           [sg.Text('???')],
           [sg.Text('???')] ]

window = sg.Window('???', layout)

while True:
    event, values = window.read()

错误原因 #

1. 布局结构错误：第三行sg.Text('???', sg.Button('???'))写法违规，PySimpleGUI要求每个界面组件都是布局列表中的独立元素，你把Button作为Text的第二个参数传递，导致Text组件的size参数被错误赋值为Button对象，渲染时触发解包错误。
2. 后续尝试的event = window.read和values = window.read是无效修改：window.read()是方法调用必须加括号，且它返回(event, values)元组，需一次性解构赋值。

修复方案 #

1. 修正布局：将Button从Text的参数中移出，作为同一行的独立元素。
2. 完善窗口循环：添加关闭窗口的判断逻辑，避免无限循环。

修正后的完整代码：

import PySimpleGUI as sg

layout = [ [sg.Text('???')],
           [sg.Text('???')],
           [sg.Text('???'), sg.Button('???')],  # 修正为两个独立元素
           [sg.Text('???')],
           [sg.Text('???')] ]

window = sg.Window('???', layout)

while True:
    event, values = window.read()
    if event == sg.WIN_CLOSED:  # 处理窗口关闭事件
        break

window.close()  # 关闭窗口释放资源

内容的提问来源于stack exchange，提问作者Gigetto