PyQt中QAbstractItemDelegate在QListView中显示异常求助

我正在学习PyQt的Delegate（委托）机制，编写了测试代码进行实践，但发现paint方法无法让NameAge组件在QListView的列表项中正确对齐，找不到原因。以下是我的测试代码及问题截图，恳请各位提供指导：

import sys

from PyQt5.QtCore import (
    Qt, QAbstractListModel, QModelIndex)
from PyQt5.QtWidgets import (
    QApplication, QWidget, QListView, QAbstractItemDelegate,
    QHBoxLayout, QLineEdit, QSpinBox, QVBoxLayout)


class NameAge(QWidget):
    def __init__(self, name='', age=0, parent=None):
        super().__init__(parent)

        self.name_edit = QLineEdit(name)
        self.age_spinbox = QSpinBox()
        self.age_spinbox.setValue(age)

        layout = QHBoxLayout()
        layout.addWidget(self.name_edit)
        layout.addWidget(self.age_spinbox)

        self.setLayout(layout)


class NameAgeModel(QAbstractListModel):
    def __init__(self, data, parent=None):
        super().__init__(parent)
        self.data = data

    def rowCount(self, parent=QModelIndex()):
        return len(self.data)

    def data(self, index, role=Qt.DisplayRole):
        if role == Qt.DisplayRole:
            return self.data[index.row()]
        elif role == Qt.EditRole:
            return self.data[index.row()]
        
    def setData(self, index, value, role):
        if role == Qt.EditRole:
            self.data[index.row()] = value
            self.dataChanged.emit(index, index)
            return True
        return False

    def flags(self, index):
        return Qt.ItemIsSelectable | Qt.ItemIsEditable | Qt.ItemIsEnabled


class NameAgeDelegate(QAbstractItemDelegate):
    def setEditorData(self, editor, index):
        name, age = index.data()
        editor.name_edit.setText(name)
        editor.age_spinbox.setValue(age)

    def setModelData(self, editor, model, index):
        name = editor.name_edit.text()
        age = editor.age_spinbox.value()
        model.setData(index, (name, age), Qt.EditRole)

    def createEditor(self, parent, option, index):
        name, age = index.data(Qt.DisplayRole)
        name_age = NameAge(name, age, self.parent())
        name_age.setGeometry(option.rect)
        return name_age

    def paint(self, painter, option, index):
        name, age = index.data(Qt.DisplayRole)
        name_age = NameAge(name, age, self.parent())
        name_age.setGeometry(option.rect)
        name_age.render(painter, option.rect.topLeft())

    def sizeHint(self, option, index):
        name, age = index.data(Qt.DisplayRole)
        name_age = NameAge(name, age, self.parent())
        return name_age.sizeHint()

    def updateEditorGeometry(self, editor, option, index):
        editor.setGeometry(option.rect)


class MainWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        layout = QVBoxLayout()
        self.setLayout(layout)

        self.list_view = QListView()
        self.list_view.setItemDelegate(NameAgeDelegate(self.list_view))
        self.list_view.setModel(NameAgeModel(
            [('Mark', 38), ('John', 30), ('Jane', 25)]))

        layout.addWidget(self.list_view)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_widget = MainWidget()
    main_widget.show()
    sys.exit(app.exec_())

目前很难找到相关示例，感谢各位的建议。

内容的提问来源于stack exchange，提问作者Mark