memory-optimization

BW #131: Canadian border crossings (solution)

Get better at: CSV files, PyArrow, reducing memory usage, working with dates and times, pivot tables, and plotting.

Aug 14, 2025 13 min read paid Featured

BW #131: Canadian border crossings

Get better at: CSV files, PyArrow, reducing memory usage, working with dates and times, pivot tables, and plotting.

Aug 14, 2025 3 min read paid Featured

BW #104: Aviation accidents (solution)

Get better at: Dates and times, memory optimization, plotting, and string manipulation

Feb 7, 2025 13 min read paid Featured

BW #104: Aviation accidents

Get better at: Dates and times, memory optimization, plotting, and string optimization

Feb 6, 2025 2 min read paid Featured

BW #64: Coal power (solution)

Get better at: Excel, memory optimization, PyArrow, grouping, regular expressions, strings, plotting, and pivot tables

May 2, 2024 15 min read paid

BW #64: Coal power

Get better at: Excel, memory optimization, PyArrow, grouping, regular expressions, strings, plotting, and pivot tables

May 2, 2024 3 min read paid

BW #51: Academy Awards (solution)

Get better at: CSV, PyArrow, missing values, cleaning, grouping, memory optimization, and plotting

Feb 1, 2024 14 min read paid

BW #51: Academy Awards

Get better at: CSV, PyArrow, missing values, cleaning, grouping, memory optimization, and plotting

Jan 31, 2024 3 min read paid

BW #43: Financial protection (solution)

Get better at: CSV, memory optimization, formatting, PyArrow, dates and times, and plotting.

Dec 7, 2023 15 min read paid

BW #43: Financial protection

Get better at: CSV, memory optimization, formatting, PyArrow, dates and times, and plotting.

Dec 6, 2023 3 min read paid

BW #34: House of Representatives (solution)

Get better at: CSV files, memory optimization, grouping, stack/unstack, window functions, and sorting.

Oct 5, 2023 16 min read paid

BW #34: House of Representatives