import sensor, image, time
import car
from pid import PID
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(10)
sensor.set_auto_whitebal(False)
clock = time.clock()
green_threshold   = ((43, 80, 108, 39, -2, 119))
red_threshold   = ((43, 80, 108, 39, -2, 119))
size_threshold = 2000
x_pid = PID(p=0.5, i=1, imax=100)
h_pid = PID(p=0.05, i=0.1, imax=50)
def find_max(blobs):
	max_size=0
	for blob in blobs:
		if blob[2]*blob[3] > max_size:
			max_blob=blob
			max_size = blob[2]*blob[3]
	return max_blob
while(True):
	clock.tick()
    
	img = sensor.snapshot()
	red_blobs = img.find_blobs([red_threshold])
    red_blobs = img.find_blobs([red_threshold])
    
	if red_blobs:
		max_blob = find_max(red_blobs)
		x_error = max_blob[5]-img.width()/2
		h_error = max_blob[2]*max_blob[3]-size_threshold
		print("x error: ", h_error)
        '''
        if green_blobs:
            max_blob = find_max(green_blobs)
            x_error = max_blob[5]-img.width()/2
            h_error = max_blob[2]*max_blob[3]-size_threshold
            print("x error: ", h_error)
       ''' 



        '''
		img.draw_rectangle(max_blob[0:4])
		img.draw_cross(max_blob[5], max_blob[6])
		x_output=x_pid.get_pid(x_error,1)
		h_output=h_pid.get_pid(h_error,1)
		print("h_output",h_output)
		car.run(-h_output-x_output,-h_output+x_output)
        
	else:
		car.run(18,-18);
        '''
```提示缩进错误，请看27行，本来要把绿色读取出来，显示缩进出错，照抄26行也报错。这是什么规则啊，搞了一晚上了，#或者‘’‘ ’‘’ 这个代表屏蔽能理解，多屏蔽一行就报错，搞不懂啊，和C差别这么大啊，随便写几句话，就报错。缩进错误，求大神解救！！！