# -*- coding: utf-8 -*-
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QListWidget, QListWidgetItem, QLabel
from PyQt5.QtCore import Qt, QMimeData
from PyQt5.QtGui import QDrag


class DragLabel(QLabel):
    def __init__(self, text):
        super().__init__(text)

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            drag = QDrag(self)
            mime_data = QMimeData()
            mime_data.setText(self.text())
            drag.setMimeData(mime_data)
            drag.exec_(Qt.MoveAction)


class ListWidget(QListWidget):
    def __init__(self):
        super().__init__()
        self.setAcceptDrops(True)
        self.setDragEnabled(True)
        self.setDragDropMode(QListWidget.InternalMove)

        for i in range(10):
            item = QListWidgetItem(self)
            label = DragLabel(f'Label {i}')
            item.setSizeHint(label.sizeHint())
            self.setItemWidget(item, label)

    def dragEnterEvent(self, event):
        if event.mimeData().hasText():
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        text = event.mimeData().text()
        item = QListWidgetItem(self)
        label = DragLabel(text)
        item.setSizeHint(label.sizeHint())
        self.setItemWidget(item, label)


class MainWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        list_widget1 = ListWidget()
        list_widget2 = ListWidget()

        self.setGeometry(300, 300, 500, 200)
        self.setWindowTitle('Drag and Drop Example')

        layout = QHBoxLayout()
        layout.addWidget(list_widget1)
        layout.addWidget(list_widget2)
        self.setLayout(layout)

        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_window = MainWindow()
    sys.exit(app.exec_())