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BW #20: World inflation (solution)
Get practice working with Excel, cleaning, multi-index, sorting, plotting
BW #20: World inflation
Get practice working with Excel, cleaning, multi-index, sorting, plotting

BW #19: Working women (solution)
Get practice working with Excel, cleaning, stack and unstack, plotting
BW #19: Working women
Get practice working with Excel, cleaning, stack and unstack, plotting

BW #18: World population (solution)
Get better with CSV, memory optimization, plotting, joins, dates and times, pivot tables, and sorting.
BW #18: World population
Get better with CSV, memory optimization, plotting, joins, dates and times, pivot tables, and sorting.

BW #17: Debt ceiling (solution)
Get better at: Using chatbots, cleaning data, and plotting with Seaborn.
BW #17: Debt ceiling
Get better at: Using chatbots, cleaning data, and plotting with Seaborn.

BW #16: Consumer oil prices (solution)
Get better at: Excel files, missing data, dates and times, string manipulation, and plotting
BW #16: Consumer oil prices
Get better at: Excel files, missing data, dates and times, string manipulation, and plotting

BW #15: Eurovision (solution)
Get better at: CSV files, plotting with Seaborn, using PyArrow, grouping, and sorting.