OpenCyber AcademyLesson map
Lesson 06 published. Map, example, EX060.
flowchart TD
L["Published run: rows 12; five with a yes tick"] --> N["Notebook: one duplicate email removed"]
N --> R{"Has a new typed list been checked?"}
R -->|No| K["Do not print 11 or 4 as this month's result"]
R -->|Yes| C["Record that run's own lines"]
A notebook finding is not a second execution of the script.
Logical drawing
lab_signups.py on the twelve-row synthetic file
rows 12; blank email 2; malformed 1; duplicates 2
unique valid addresses with a yes tick: 5
first-month notebook
one duplicate email removed
|
+-- the removal is a finding, not a rerun
+-- 12 minus 1 is arithmetic, not a measurement
+-- the script is not edited to force a new print
Learning outcomes
After this chapter, you should be able to:
- Keep the published twelve-row output as the only verified count of that file.
- Reject 11 rows, or 4 sendable addresses, when nobody has rerun the check.
- Leave the program and its printed lines unchanged.
6.1 The notebook and the script answer different questions
The first month's notebook says one duplicate email was removed. That sentence records a check. The script's print describes the synthetic file of twelve rows, before anyone subtracts. A classmate writes "open send list this month: 4" because one duplicate left the café. The five were unique addresses with an exact yes tick. Removing a duplicate does not, by itself, remove one of those five, and it does not shrink the twelve-row file. Either effect would have to be counted on a new export. Kwame does not type 4 or 11 into the notebook as if the program had printed them.
6.2 Worked example
Lesson table; scroll horizontally to read all columns →
| Claim | What was actually done | Decision |
|---|---|---|
| "One duplicate was taken off the working list." | The notebook says so | Keep it as a finding |
| "So the file is now 11 rows." | No new run | Refuse the number |
| "So only four people may be emailed." | The five were already unique | Refuse. Uniqueness was already in the print |
| "Edit the ticks so the next print looks tidier." | The script counts the file it is given | Refuse the edit |
Synthetic case. The lines
rows 12andunique valid addresses with a yes tick: 5stay the published run.
Errors and limits
A later month might show different counts. Those counts exist only after that month's list is checked. This chapter does not perform that check.
Apply
- EX060 — Do not subtract the notebook. Someone writes "this month: 11 rows and 4 yes-tick addresses" because one duplicate was removed. What is wrong with both numbers, and which print remains the verified one?
Show marking criteria
Rubric: 3 = neither 11 nor 4 was counted; the verified print is still 12 rows and 5 yes-tick addresses; do not edit the script;; 2 = reject both numbers and keep the published print;; 1 = one number;; 0 = none.