5. Python for Pipelines (pandas to files/DB)
pandas ne CSV clean karun parquet/DB — chhote pipelines. Spark nantar.
What you will learn in this chapter
- Script vs notebook for jobs
- Read → clean → write pattern
- Idempotent runs idea
- Logging beginner habit
- Practice
Fictional labs
India retail stories (Raja Traders Nagpur, Mauli Dairy Pune) are fictional. Spark samples are tiny/local — no live cluster claimed.
Concepts in this chapter
The chapter recap is at the end of the last concept page.