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如何插入一段漂亮的代码片

去博客设置页面，选择一款你喜欢的代码片高亮样式，下面展示同样高亮的 代码片.

// An highlighted block
class filterWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):
        layout  = QVBoxLayout()
        self.setLayout(layout)
        self.tree = QTreeWidget()
        self.tree.setHeaderHidden(True)  # 隐藏表头
        self.tree.resize(300,600)
        self.tree.setColumnCount(2)
        self.tree.setColumnWidth(0,300)


        # root Node
        root = QTreeWidgetItem(self.tree)
        root.setText(0, "Root")
        root.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsSelectable )
        root.setCheckState(0, Qt.Checked)

        # add child to root
        child1 = QTreeWidgetItem(root)
        child1.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsSelectable )
        child1.setText(0, "Child 1")
        child1.setCheckState(0, Qt.Checked)

        # 添加子节点2
        child2 = QTreeWidgetItem(root)
        child2.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsSelectable )
        child2.setText(0, '子节点2')
        child2.setCheckState(0, Qt.Checked)

        # 为child2添加一个子节点
        child3 = QTreeWidgetItem(child2)
        child3.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsSelectable )
        child3.setText(0, '子节点3')
        child3.setCheckState(0, Qt.Checked)

        # 为child2添加一个子节点
        child4 = QTreeWidgetItem(child2)
        child4.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsSelectable)
        child4.setText(0, '子节点4')
        child4.setCheckState(0, Qt.Checked)

        # 默认所有节点都处于展开状态
        self.tree.expandAll()

        self.tree.itemChanged.connect(self.onTreeItemChanged)

        layout.addWidget(self.tree)
           def onTreeItemChanged(self, item, column):
        def get_Node_parent(item):
            if item.parent():
                return item.parent()
        def get_Node_child(item,childList):
            if item.childCount() == 0:
                childList.append(item)
            if item.childCount() > 0:
                for i in range(item.childCount()):
                    child_item = item.child(i)
                    childList.append(child_item)
                    get_Node_child(child_item,childList)
            return  childList

        def get_sample_level(item,is_sample = None):
            level = []
            sample_node = item.parent()
            if sample_node.childCount() == 1:
                level.append(item)
            elif sample_node.childCount() > 1:
                for i in range(sample_node.childCount()):
                    level.append(sample_node.child(i))
            if is_sample is None or is_sample is False:
                return level
            # 判断所有节点状态是否一致
            first_state = level[0].checkState(0)
            all_same_state = all(item.checkState(0) == first_state for item in level)
            if all_same_state:
                return  True
            else:
                return  False

        def get_All_Node(item):
            items = []
            for i in range(item.childCount()):
                child  = item.child(i)
                items.append(child)
                items.extend(get_All_Node(child))
            return items

        # 选中叶子节点
        if item.childCount() == 0:
            Node_parent = get_Node_parent(item)
            sample_level_code = get_sample_level(item, is_sample=True)
            if item.checkState(0) != Node_parent.checkState(0):
                # 检查其他节点的状态是否与第一个节点一致
                if sample_level_code:
                    Node_parent.setCheckState(0, item.checkState(0))
                else:
                    Node_parent.setCheckState(0, Qt.PartiallyChecked)
        # 选中根节点
        elif item.parent() is None:
            if item.checkState(0) == Qt.PartiallyChecked:
                return
            Node_All = get_All_Node(item)
            if item.checkState(0) == Qt.Checked:
                for i in Node_All:
                    if i.checkState(0) != Qt.Checked:
                        i.setCheckState(0, Qt.Checked)
            elif item.checkState(0) == Qt.Unchecked:
                for i in Node_All:
                    if i.checkState(0) != Qt.Unchecked:
                        i.setCheckState(0,  Qt.Unchecked)
        elif item.parent() is not None and item.childCount() > 0:
            Node_parent = get_Node_parent(item)
            sample_level_code = get_sample_level(item,is_sample = True)
            # 更新父节点的状态
            if sample_level_code:
                Node_parent.setCheckState(0, item.checkState(0))
            else:
                Node_parent.setCheckState(0, Qt.PartiallyChecked)
            if item.checkState(0) != Qt.PartiallyChecked:
                # 更新子节点的状态
                child_list = get_Node_child(item,[])
                for i in child_list:
                    i.setCheckState(0, item.checkState(0))

    def add_child_with_checkbox(self, parent, depth):
        if depth == 0:
            return
        for i in range(3):
            child = QTreeWidgetItem()
            child.setFlags(child.flags() | 0x20)  # 添加 ItemIsUserCheckable 标志
            child.setText(0, f"Child {i + 1}")
            parent.addChild(child)
            self.add_child_with_checkbox(child, depth - 1)