pythonnumpypandasdata-analysis
NumPy vs pandas: which should you learn first?
Arrays and tables solve different shapes of work. Here is how evening learners from Excel should choose which library to open first.
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Tag: data-analysis
Arrays and tables solve different shapes of work. Here is how evening learners from Excel should choose which library to open first.
Three pandas moves you can finish after work: read a CSV, filter the rows that matter, and groupby to a number per category.
Official DuckDB v2.0 preview (17 Aug 2026): new parser, storage, and server mode. After-work analysts on CSV/Parquet should stay in-process, pick 1.4 LTS vs 1.5 from the calendar, and back up before 2.0. Spark is not required.
AI will not fully replace data analysts. Agents can query and chart, but not decide the question. After-work Python for the job you already have.
Pandas 3.0 made Copy-on-Write default. Chained assignment can fail silently. Patch pandas tonight; keep Polars for big ETL, not a stack rewrite.