# Picasa 3.9: PicasaPy: Virág Attila Rebuilds Picasa 3.9

> Source: <https://reversedwithai.com/p/picasa-3-9-f154a28e>
> Published: 2026-10-27 20:31:54+00:00

## Evidence at a glance

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## What was done

PicasaPy is an open-source rewrite of Picasa 3.9 using Python and Qt. The project was reverse-engineered with Ghidra and developed with assistance from Claude and Codex.

PicasaPy is an open-source photo management and editing application designed as a modern successor to Google Picasa. The project aims to maintain compatibility with the original Picasa `.picasa.ini` file format, allowing both applications to interact with the same photo folders. According to the author, Virág Attila, the software was reverse-engineered using Ghidra and built with the assistance of Claude and Codex [https://x.com/sanchomuzax/status/2115160045243814263](https://x.com/sanchomuzax/status/2115160045243814263). The application is implemented in Python 3.12+ using PySide6 and Qt Quick. While PicasaPy updates file modification times to trigger refreshes in Picasa, the author notes that the shared format does not support conflict-safe live synchronization, as Picasa may overwrite external edits during its own write operations. Development history shows extensive use of AI agents, specifically the `picasapy-claude-agent`, to refactor components and implement features. The project is licensed under GPL-3.0.

## From the source

## Reproduce it

```
For Linux: git clone https://github.com/sanchomuzax/PicasaPy.git; cd PicasaPy; sudo apt-get install -y $(python3 scripts/print_dependencies.py --apt); python3.12 -m venv .venv; source .venv/bin/activate; python -m pip install .; picasapy ~/Pictures
```

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