这个错误是怎么回事，求解（江湖救急）

不是，是复制粘贴到论坛上时，自己乱的

除了格式之外的错误

import sensor, image,time,pyb,utime
import sensor, image, time,utime
from pyb import UART
p0 = pyb.Pin('P0', pyb.Pin.OUT_PP)
p0.value(1)
uart = UART(3, 57600)
output_str=0
yanse=0
flag=1
while 1:
  if uart.any():
	 flag=uart.readline().decode()
	 flag=int(flag)
	 print(flag)
  if flag==1:
          thresholds = [(60, 18, 37, 75, -35, 76),(58, 24, -11, 17, -61, -16),(60, 30, -17, -58, -43, 31)]
          sensor.reset()
		      sensor.set_pixformat(sensor.RGB565)
		 sensor.set_framesize(sensor.QVGA)
		 sensor.skip_frames(time = 2000)
		 sensor.set_auto_gain(False)
		 sensor.set_auto_whitebal(False)
		 while flag :
            if uart.any():
               flag=uart.readline().decode()
               flag=int(flag)
		    img = sensor.snapshot()
		    blobs=img.find_blobs(thresholds, pixels_threshold=5000, area_threshold=400)
		    for blob in blobs:
			  img.draw_rectangle(blob.rect())
			  img.draw_cross(blob.cx(), blob.cy())
			  yanse="%s" % (blob.code())
			  print( yanse)
			  pyb.delay(500)
			  if  yanse:
				 pyb.delay(10)
				 uart.write(yanse)
				 p0.value(0)
				 pyb.delay(10)
				 p0.value(1)
				 yanse=0
                 
  if flag==2:
	sensor.reset()
	sensor.set_pixformat(sensor.GRAYSCALE)
	sensor.set_framesize(sensor.VGA)
	sensor.set_windowing((240, 240))
	sensor.skip_frames(30)
	sensor.set_auto_gain(False)
	while flag :
	  img = sensor.snapshot()
	  img.lens_corr(0.1)
	  for code in img.find_qrcodes():
		img.draw_rectangle(code.rect(), color = (255, 0, 0))
		output_str="%s" % (code.payload())
		print(output_str)
		pyb.delay(500)
		if output_str:
		   uart.write(output_str)
		   pyb.delay(10)
		   p0.value(0)
		   pyb.delay(10)
		   p0.value(1)
		   output_str=0
		   flag=0