from PyQt5 import QtCore, QtGui, QtWidgets, QtNetwork
from PIL import Image
import threading

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        threads=[]
        self.label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
        self.setCentralWidget(self.label)

        url = 'https://www.dependiendo.com/wp-content/uploads/2016/10/Imagenes-De-Carros-Tunados-mejores-1.jpg'
        manager = QtNetwork.QNetworkAccessManager(self)
        manager.finished.connect(self.onFinished)
        manager.get(QtNetwork.QNetworkRequest(QtCore.QUrl(url)))
        t = threading.Thread(target=self.onFinished)
        threads.append(t)
        t.start()

    @QtCore.pyqtSlot(QtNetwork.QNetworkReply)
    def onFinished(self, reply):
        image = QtGui.QImage.fromData(reply.readAll())
        if not image.isNull():
            pixi = QtGui.QPixmap.fromImage(image).scaled(150,150)
            self.label.setPixmap(pixi)
            self.label.resize(150,150)



        reply.deleteLater()

if __name__ == '__main__':
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.showMaximized()
    sys.exit(app.exec_())