PySide QPropertyAnimation Not Starting

PySide QPropertyAnimation Not Starting

The problem is that when I call QPropertyAnimation.start(), nothing happens.
Color is the property I'm animating and button is the class.
class Button(QPushButton):
def __init__(self,text="",parent=None):
super(Button,self).__init__(text,parent)
self.setFixedHeight(60)
self.setFixedWidth(250)
self.innercolor = QColor(200,0,20)
def setcolor(self,value): self.innercolor = value
def getcolor(self): return self.innercolor
color = Property(QColor,getcolor,setcolor)
def paintEvent(self, event):
p = QPainter(self)
p.fillRect(self.rect(),self.color)
p.end()
def animated(self,value): print "animating"; self.update()
def enterEvent(self, event):
ani = QPropertyAnimation(self,"color")
ani.setStartValue(self.color)
ani.setEndValue(QColor(0,0,10))
ani.setDuration(2000)
ani.valueChanged.connect(self.animated)
ani.start()
print ani.state()
return QPushButton.enterEvent(self, event)
I'm confused because "animating" never prints out, but ani.state() says
the animation is running.
I'm not asking to debug my code or anything, but I think there must be
something I'm missing, either in my code or in my understanding of the use
of QPropertyAnimation.
I've searched google for an answer, but nothing came up, nothing relevant
to me anyway. The closest I found was (another SO question)[problem with
QPropertyAnimation in Qt, btu I still couldn't turn that into an answer
for myself.