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Sequence 131 — T6 - files, pathlib and exceptions
Context: Technology Gate B - Programmatic Data Management | Technology Gate
Source: CDMP Master Execution Manual
When / purpose
Work safely with project files and predictable failures.
What you should learn
- pathlib paths.
- Read/write text/CSV/JSON at basic level.
- try/except for expected failures.
- Output separation.
Resources / limits
Technology Competency Roadmap: active T6–T10 only. Detailed Technology Competency Reference: topic detail/readiness only.
Do this in order
- Enumerate files in a Meridian source folder.
- Read a file.
- Write output to generated/ rather than overwriting raw/.
- Handle a missing-file case with a useful message.
Meridian application
Use Meridian synthetic files and database only for bounded practice.
Create / save
Safe file-processing script.
Stop / boundary
Stop before production data engineering, application development, advanced OOP, orchestration or distributed processing.
Completion gate
You can read/write in the correct project folders and handle a predictable failure.
NEXT → Sequence 132
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