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testing = 0if not testing:    import clr    from PythonInterop import xObjectimport random, math, timeif testing:    mx = 300    my = 200    class xObject:        x=0        y=0#layers on top of xObject because we can't override incoming functionsinsts = []class pyObj(xObject):    ax = 0    ay = 0    vx = 0    vy = 0    def __init__(self):        insts.append(self)        self.x = random.randint(0,800)        self.y = random.randint(0,600)        self.sx = 0.1        self.sy = 0.1/3        #a test game object        class myObj(pyObj):    def step(self):        #orbit mx, my in some manner        dx = self.x - mx        dy = self.y - my        dir = math.atan2(dy, dx)        dist = math.sqrt(dx*dx + dy*dy)/6        if dist<10: dist = 10        self.ax = -math.cos(dir) * 400 / (dist*dist)        self.ay = -math.sin(dir) * 400 / (dist*dist) + 0.2        #speed limit        lim = 10        if self.vx<-lim: self.vx=-lim        if self.vx>lim : self.vx= lim        if self.vy<-lim: self.vy=-lim        if self.vy>lim : self.vy= lim        #mcBounce        damp = 0.9        if self.x<0:            self.x=0            self.vx*=-damp        elif self.x>800:            self.x=800            self.vx*=-damp        if self.y<0:            self.y=0            self.vy*=-damp        elif self.y>600:            self.y=600            self.vy*=-damp        #integrate        self.vx += self.ax        self.vy += self.ay        self.x += self.vx        self.y += self.vy        self.angle = math.atan2(self.vx,self.vy)+3.1416/2#call the step function on our objects when C# says todef stepper():    for inst in insts:        inst.step()#make N instances when the script is startedfor i in xrange(0,1000):    this = myObj()if testing:    frames = 30    start = time.time()    for i in range(0,frames):        stepper()    length = time.time() - start    fps = frames/length    print str(frames)+" frames in "+str(length)+" seconds"    print str(fps)+" fps"