ageron/handson-mlp

[bug] Two datasets(oecd_bli.csv, gdp_per_capita.csv) are odd.

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#22 opened on Feb 2, 2026

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Description

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Chapter 1. The Machine Learning Landscape

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Describe your issue

As the title suggests, the two datasets (oecd_bli.csv and gdp_per_capita.csv) contain some inconsistencies.

First, the gdp_per_capita.csv file does not include data for Japan in the year 2020.
Second, the country names for Czech Republic, Korea, and Slovak Republic differ between the two files.

As a result, these four countries are missing from lifesat_full.csv.

Enter what you expected to happen

The datasets should be corrected by adding Japan’s 2020 data into gdp_per_capita.csv and standardizing the names of the three countries in both files.

If you found a workaround, describe it here

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Contributor guide

Research direction
Locate the oecd bli.csv and gdp per capita.csv files in the repository. Add Japan's 2020 GDP per capita data to gdp per capita.csv. Standardize country names for Czech Republic, Korea, and Slovak Republic across both files to match the naming in lifesat full.csv.
Tech stack
python
Domain
datamachine learning
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonCSV
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90