pyarrow

BW #112: Programming jobs (solution)

Get better at: Excel files, regular expressions, optimizing speed, PyArrow, grouping, joining, and plotting.

Apr 3, 2025 14 min read paid Featured

BW #112: Programming jobs

Get better at: Excel files, regular expressions, optimizing speed, PyArrow, grouping, joining, and plotting.

Apr 2, 2025 3 min read paid Featured

BW #72: City travel (solution)

Get better at: CSV files, PyArrow, multi-indexes, index operations, plotting, grouping, sorting, correlations, and joins.

Jun 27, 2024 14 min read paid

BW #71: Holidays

Get better at: CSV files, PyArrow, multi-indexes, index operations, plotting, grouping, sorting, correlations, and joins.

Jun 19, 2024 2 min read paid

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 #56: Rent increases (solution)

Get better at: CSV, PyArrow, regular expressions, filtering, plotting, window functions, cutting, and pivot tables

Mar 7, 2024 14 min read paid

BW #56: Rent increases

Get better at: CSV, PyArrow, regular expressions, filtering, plotting, window functions, cutting, and pivot tables

Mar 7, 2024 2 min read paid

BW #55: IVF (solution)

Get better at: CSV, PyArrow, grouping, stack-unstack, and pivot tables.

Feb 29, 2024 10 min read paid

BW #55: IVF

Get better at: CSV, PyArrow, grouping, stack-unstack, and pivot tables.

Feb 28, 2024 4 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