multiple-files

BW #138: Federal workers (solution)

Get better at: Working with multiple CSV files, grouping, pivot tables, dates and times, speed optimization, and memory optimization.

Oct 3, 2025 16 min read paid Featured

BW #138: Federal workers

Get better at: Working with multiple CSV files, grouping, pivot tables, dates and times, speed optimization, and memory optimization.

Oct 1, 2025 3 min read paid Featured

BW #135: Airline seats (solution)

Get better at: Scraping, working with multiple files, regular expressions, grouping, and pivot tables

Sep 11, 2025 11 min read paid Featured

BW #135: Airline seats

Get better at: Scraping, working with multiple files, regular expressions, grouping, and pivot tables

Sep 10, 2025 2 min read paid Featured

BW #129: Tom Lehrer (solution)

Get better at: Working with multiple files, strings, regular expressions, and Web scraping

Jul 31, 2025 13 min read paid Featured

BW #129: Tom Lehrer

Get better at: Working with multiple files, strings, regular expressions, and Web scraping

Jul 30, 2025 3 min read paid Featured

BW #119: Python conferences (solutions)

Get better at: CSV files, working with dates and times, grouping, plotting, and handling multiple files.

May 23, 2025 12 min read paid Featured

BW #119: Python conferences

Get better at: CSV files, working with dates and times, grouping, plotting, and handling multiple files.

May 22, 2025 2 min read paid Featured

BW #113: US airport traffic (solution)

Get better at: Excel files, multiple files, pivot tables, grouping, dates and times, and plotting

Apr 10, 2025 15 min read paid Featured

BW #113: US airport traffic

Get better at: Excel files, multiple files, pivot tables, grouping, dates and times, and plotting

Apr 9, 2025 3 min read paid Featured

BW #105: Federal employees (solution)

Get better at: String manipulation, working with multiple files, joins, grouping, and plotting

Feb 14, 2025 16 min read paid Featured

BW #105: Federal employees