How do you handle large files that do not fit in memory?
Model answer
Process them in chunks or lines (for line in f), use generators, pandas read_csv(chunksize=...), or tools designed for larger data such as Polars or DuckDB. Aggregate incrementally and avoid loading everything to a list.
Learn this topic
Mini Project: Analyse a CSV File and Make a Report in the course Python for Beginners: Learn to Code with Real Projects.
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