Applied Checkpoint: Validate Study Records

Unit ID: M04-U09 Estimated active time: 45-60 minutes

Supplied data

records = [
    {"id": "R1", "hours": 8},
    {"id": "R2", "hours": -2},
    {"id": "R3", "hours": "6"},
    {"id": "   ", "hours": 4},
    {"id": "R5", "hours": 40},
    {"id": "R6", "hours": True},
    {"hours": 12},
]

Use only these fictional records.

Rules

A record is accepted only when:

• id exists, has exact type str, and contains non-whitespace text;
• hours exists, has exact type int, and is from 0 through 40 inclusive.

Required outputs

Create:

• accepted_records: copies of valid records;
• rejected_records: dictionaries containing the original position, a safe display ID, and a list of reasons;
• accepted_hours_total;
• accepted and rejected counts; and
• has_rejections boolean.

Do not overwrite or remove items from records.

Required process

1. Write the plain-language algorithm before coding.
2. Initialise all output state before the loop.
3. Use enumerate(records, start=1).
4. Create a fresh reasons list for each record.
5. Validate ID and hours separately.
6. Use elif so range comparison occurs only after integer type passes.
7. Append a record copy only when reasons is empty.
8. Otherwise, append all reasons to rejected output.
9. Calculate summary values after or during the loop without double counting.

Expected result

• Accepted IDs: R1, R5
• Accepted count: 2
• Rejected count: 5
• Accepted hours total: 48
• Rejections exist: True

Required assertions

Assert the expected counts and total. Also assert that records still equals a preserved source copy.

Self-review rubric