Unit 1 Evidence Check: Source to Output

Open the small program you used for your first Code Defense.

Create a short trace using these four labels:

SOURCE
EXECUTION
OUTPUT
REPAIR

Under each label, record one exact piece of evidence from your work. Then explain, in about 75–125 words or a one-minute recording, which layer you originally misunderstood most and what finally made it clear.

Do not summarize the entire Unit. Use the program itself. A useful answer can point to one changed line, one command, one observed output, and one error you repaired.

Finish with one sentence beginning:

Next time a Python program appears to ignore my change, I will check...