The following code, rather than drawing a circle with no border, draws a black
border. The corresponding QGraphicsView code works correctly.


from   PySide.QtCore import *
from   PySide.QtGui  import *
import sys

class Painting(QWidget):
    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setPen(Qt.NoPen)
        painter.setBrush(QBrush(QColor(200,100,50)))
        painter.drawEllipse(event.rect().center(), 100, 100)

app = QApplication(sys.argv)
w = Painting()
w.show()
sys.exit(app.exec_())