如何从QInputDialog中删除所有按钮

from PyQt5.QtWidgets import QInputDialog, QDialogButtonBox, QVBoxLayout, QApplication, QDialog

app = QApplication([])
dialog = QInputDialog()

# 获取对话框的布局
layout = dialog.layout()

# 找到QDialogButtonBox对象
button_box = None
for i in range(layout.count()):
    item = layout.itemAt(i)
    if isinstance(item.widget(), QDialogButtonBox):
        button_box = item.widget()
        break

# 将QDialogButtonBox设置为不可见
if button_box:
    button_box.setVisible(False)

dialog.exec_()