Having problem in storing data from vision shield into a sd card

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1

im using this code and it is giving me error on the last phase by giving me this error OSError: [Errno 2] ENOENT

"the code i am using"

import pyb

# Initialize the SD card
pyb.SDCard(True)

sensor.reset()                         # Reset and initialize the sensor.
sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA)      # Set frame size to QVGA (320x240)
sensor.set_windowing((240, 240))       # Set 240x240 window.
sensor.skip_frames(time=2000)          # Let the camera adjust.

net = "trained.tflite"
labels = [line.rstrip('\n') for line in open("labels.txt")]

clock = time.clock()
while(True):
    clock.tick()

    img = sensor.snapshot()

    # default settings just do one detection... change them to search the image...
    for obj in tf.classify(net, img, min_scale=1.0, scale_mul=0.8, x_overlap=0.5, y_overlap=0.5):
        print("**********\nPredictions at [x=%d,y=%d,w=%d,h=%d]" % obj.rect())
        img.draw_rectangle(obj.rect())
        # This combines the labels and confidence values into a list of tuples
        predictions_list = list(zip(labels, obj.output()))

        for i in range(len(predictions_list)):
            confidence = predictions_list[i][1]
            label = predictions_list[i][0]
            print("%s = %f" % (label, confidence))

            if confidence > 0.9 and label != "unknown":
                print("It's a", label, "!")
                # Write the detected label to a file on the SD card
                with open('/sdcard/attendance.txt', 'a') as f:
                    f.write(label + ',' + str(time.time()) + '\n')

    print(clock.fps(), "fps")
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