Pathwise

Manuals / Python / Checkpoint 6

B · Structure · beginner · Gate · Week 3–4 · Checkpoint 6 of 13

Checkpoint A — Syntax, modules & files

Before pytest and httpx, prove you can write clean Python in a proper project layout. Fix gaps before Phase C — the Playwright path assumes this baseline.

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Step 1 of 3

Pass criteria

You pass when all six are true. Audit py-journey. Fix failures this week.

  • venv activates; requirements.txt committed; no global pip installs for project deps
  • src/ + tests/ layout with 5+ pure helper functions (no I/O in unit-testable ones)
  • List comprehensions and dict .get used — not index errors on missing keys
  • JSON load/save with pathlib.Path and encoding="utf-8"
  • Can explain why indentation matters and what a module is in 60 seconds
  • Code pushed to GitHub with 3+ meaningful commits
Pass criteriaDrag stickies · tap for tips
Study mapDrag stickies · tap for tipsKeep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Assert the UIdrag · tap →Retry wiselydrag · tap →Seed datadrag · tap →Close the loopdrag · tap →Keep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Pathwise hackdrag · tap →Pass criteriadrag · tap →Try thisdrag · tap →Follow the dashed drag · tap →

Do this now

Mark pass/fail for each criterion in README. Fix failures before continuing.

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Chapter learning outcomes
  • Self-assessment
  • Project layout readiness

Clear these before you leave

Side quest

Rubber duck

Explain venv, import, and json.load to an imaginary teammate in 3 minutes — no notes.