PythonRuntimeError:thread.__init__()notcalled解决方法

代码如下:

class NotifyTread(threading.Thread):
def __init__(self, params):
threading.Thread.__init__(self) #here。。。。。。
self.params = params

def run(self):
print "start notify............"
time.sleep(10)
print notify_tran(self.params)
print "end notify.............."