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API and console: only if you build apps
Part 6 closes the Claude product map: chat subscriptions and the API Console are separate bills and separate jobs. Open platform.claude.com only if you build software that calls…
Missing data and dtypes
Nulls, empty strings, and bad dtypes break joins and totals in quiet ways. Learn safe pandas casting with coerce, careful fill versus drop, and a symptom-to-fix table you…
First week of useful tasks (write, plan, learn)
Part 1 of the ChatGPT everyday tutorial: a Mon-Fri week in plain Chat with write, plan, and learn buckets. One real deliverable per day, worked prompts, and no…
Models chooser: Haiku, Sonnet, Opus, and Fable (no hype)
Part 5 of the Claude product map: pick Haiku, Sonnet, Opus, or Fable without FOMO. Start on the default, upgrade only when a clear prompt still fails, and…
Joins and merges in plain English
Learn how pandas merges map to SQL joins, when row counts explode, and how to check keys with validate and indicator. A customers-and-orders walkthrough keeps grain honest before…
