Try This: Improve the Script

Try This - Prove it Works

If you’re skeptical that packet = "HAPPY" followed by getattr(Image, packet) is equivalent to Image.HAPPY, try this:

Add this routine between sleep(1000) and while True: in the transmitter script radio_send_images.py.
Flash the modified script.

print("Image.HAPPY =", Image.HAPPY)
sleep(500)
packet = "HAPPY"
print( "getattr(Image, packet) =", getattr(Image, packet) )    
sleep(500)

Open the terminal.
Verify that the results resemble what’s shown here.

Image(…) has brightness data for each LED in the display. In this case it only uses 0 (LED off), and 9 (LED brightest). Values between 0 and 9 for each LED can be used to control the brightness.

Your Turn - Compact your Code

This code takes up unnecessary program space in the micro:bit module’s memory.

    packet = "HAPPY"
    print("Send:", packet)
    radio.send(packet)
    sleep(2500)
    
    packet = "SAD"
    print("Send:", packet)
    radio.send(packet)
    sleep(2500)

    packet = "ANGRY"
    print("Send:", packet)
    radio.send(packet)
    sleep(2500)

Your program can instead create a list like string_list = ["HAPPY", "SAD", "ANGRY"]. Then, inside the while True loop, the for packet in string_list can index through each string in string_list.

Use that hint to modify the radio_send_images transmitter script.
Test and verify your solution.

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