Test false positives and hand off
See this course’s project requirements
A checked extraction script for fictional equipment tags, dates and log lines, with a mismatch report and exact-match safety boundaries.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- A precise tag grammar with four checked cases.
- A segment-by-segment match explanation.
- A whole-input validation rule with a counterexample.
- An extracted log record with explicit string/number distinctions.
- A semantic date check separate from regex matching.
- A tested tag-and-log extraction tool with semantic limits.
Review and revise
Use these criteria to check your work and choose what to improve.
- The implementation or declared simulation follows the supplied contract and retains inspectable original inputs.
- Normal, boundary and rejected cases are recorded with expected versus observed results.
- The changed case has a correct explanation and does not rely on hidden state.
- The project includes source, outputs, instructions and honest tool, privacy and verification limits.
Want more background?
The idea in everyday life
Run text_patterns.py. Cases cover padding, extra text, accepted state, impossible date and multiple-tag extraction.
A parser handoff includes positive, negative and misleading-but-shaped cases. Explain exactly what the script accepts; do not market its sample grammar as universal text understanding.
Test false positives and hand off — original worked practice
A parser handoff includes positive, negative and misleading-but-shaped cases. Explain exactly what the script accepts; do not market its sample grammar as universal text understanding.
Run text_patterns.py. Cases cover padding, extra text, accepted state, impossible date and multiple-tag extraction.
1. Step 1
Execute the six supplied assertions.
You should see: The script prints 6 text checks passed.
This keeps the rule and its observable result together.
2. Step 2
Add uppercase/lowercase and trailing-space cases.
You should see: Only exact contract variants are accepted.
This keeps the rule and its observable result together.
3. Step 3
Record an impossible-shaped date rejection.
You should see: Regex success does not bypass calendar validation.
This keeps the rule and its observable result together.
4. Step 4
Package code, grammar and expected/observed matrix.
You should see: A tested tag-and-log extraction tool with semantic limits.
This keeps the rule and its observable result together.
What to finish
A tested tag-and-log extraction tool with semantic limits.
Watch for this
Showing only valid identifiers and missing plausible but malformed near-matches.
How can I tell I understand it?
Explain and demonstrate the required distinction: A parser handoff includes positive, negative and misleading-but-shaped cases. Explain exactly what the script accepts; do not market its sample grammar as universal text understanding. Show a changed input and the expected result without weakening this contract.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
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Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
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Sources and further reading
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Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
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