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form PySide2.QtGui import *


def __init__(self, parent):
    QMainWindow.__init__(self, parent)
    clipboard = QApplication.clipboard()

    centralWidget =  QWidget(self)
    currentItem =  QWidget(centralWidget)
    mimeTypeLabel =  QLabel(tr("MIME types:"), currentItem)
    mimeTypeCombo =  QComboBox(currentItem)
    dataLabel =  QLabel(tr("Data:"), currentItem)
    dataInfoLabel =  QLabel("", currentItem)

    previousItems =  QListWidget(centralWidget)

//! [0]
    connect(clipboard, SIGNAL("dataChanged()"), self, SLOT("updateClipboard()"))
//! [0]
    connect(mimeTypeCombo, SIGNAL("activated(const QString &)"),
            self, SLOT("updateData(const QString &))")

    currentLayout = QVBoxLayout(currentItem)
    currentLayout.addWidget(mimeTypeLabel)
    currentLayout.addWidget(mimeTypeCombo)
    currentLayout.addWidget(dataLabel)
    currentLayout.addWidget(dataInfoLabel)
    currentLayout.addStretch(1)

    mainLayout = QHBoxLayout(centralWidget)
    mainLayout.addWidget(currentItem, 1)
    mainLayout.addWidget(previousItems)

    setCentralWidget(centralWidget)
    setWindowTitle(tr("Clipboard"))

//! [1]
def updateClipboard(self):
    formats = clipboard.mimeData().formats()
    data = clipboard.mimeData().data(format)
//! [1]

    mimeTypeCombo.clear()
    mimeTypeCombo.insertStringList(formats)

    size = clipboard.mimeData().data(formats[0]).size()
    Item = QListWidgetItem(previousItems)
    Item.setText(tr("%1 (%2 bytes)").arg(formats[0]).arg(size))

    updateData(formats[0])
//! [2]
//! [2]

def updateData(self, format)
    data = clipboard.mimeData().data(format)
    dataInfoLabel.setText(tr("%1 bytes").arg(data.size()))