Damn ImageViewer by PyQt5 and QtQuick.

qqimageviewer.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
from os.path import (
    join,
    dirname,
)

from PyQt5.QtCore import QUrl
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtQuick import QQuickView

app = QGuiApplication(sys.argv)
view = QQuickView()

view.engine().quit.connect(app.quit)
view.rootContext().setContextProperty("imageUrl", sys.argv[1]);

url = QUrl(join(dirname(__file__), 'qqimageviewer.qml'))
view.setSource(url)
view.show()
sys.exit(app.exec_())

qqimageviewer.qml

import QtQuick 2.0

Rectangle {
    id: imageViewer
    width: 400
    height: 300

    Image {
        id: view
        clip: true
        sourceSize.width: 0
        anchors.fill: parent
        source: imageUrl
    }

    Rectangle {
        id: closeButton
        width: 100
        height: 100
        color: 'gray'
        anchors.right: parent.right

        MouseArea {
            anchors.fill: parent
            onPressed: {
                Qt.quit()
            }
        }

        Text {
            text: 'close'
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignVCenter
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.verticalCenter: parent.verticalCenter
            wrapMode: Text.NoWrap
        }
    }
}