Unhandled ZeroDivisionError Risk in wikipedia_report.py on Empty Data

[pranjal2004838]

Description

wikipedia_report.py has a potential crash due to ZeroDivisionError when processing empty language datasets. Specifically, if the CSV data file was successfully fetched but contained only headers (0 data rows)—which is a common edge case during API outages or schema changes—len(data) will evaluate to 0, causing the script to crash on division.:

Reproduction

1. Run wikipedia_report.py where the corresponding Wikipedia CSV data file under data/ is empty or contains only headers (0 data rows).
2. The script executes:

   • quantifying/scripts/3-report/wikipedia_report.py

     Line 106 in 33577d9

     average_articles = total_articles / len(data)

3. Since len(data) is 0, a ZeroDivisionError is thrown.
4. The reporting phase crashes entirely.

Expectation

The script should handle the case where the data rows are empty by defaulting the average to 0 and continuing to generate the report.

Environment

Software	Version
Python	3.11
OS	Windows / Linux / macOS