PsychoPy Builder Download

Purpose & User Intent: The tool helps researchers and students obtain a PsychoPy Builder distribution that matches their operating system, Python version, and desired components. It solves the problem of ambiguous downloads by offering a mapped set of installers and checksums to ensure reproducible experiment environments. Core users include behavioral scientists, cognitive researchers, and lab technicians who deploy PsychoPy experiments across Windows, macOS, and Linux. It emphasizes accuracy in version compatibility and streamlined acquisition.
Core Logic & Features: It maps OS, Python version, and PsychoPy release to a supported installer (wheel, bundle, or source). It validates inputs, generates a direct download URL, and provides optional components like runtime dependencies or headless installers. Optional features include alternative mirrors and offline bundles. The tool outputs an installer package reference, size, and integrity checksum to aid auditing.
Inputs & Outputs: Inputs include os, python_version, psycho_version, installer_type, and components. Outputs provide download_url, size_bytes, checksum, and a record of the chosen distribution.
Algorithms & Calculations: Uses a compatibility matrix and URL assembly rules; validates inputs against known combinations; computes sha256 checksums when available and estimates file size for user awareness.
Error & Edge Cases: Unrecognized OS or Python version yields a guidance code and suggested match. Missing required inputs produce field-level errors; external mirror downtime falls back to a cached option with a delay indicator. Localization notes ensure SI-based size reporting.
Assumptions & Exclusions: Assumes internet access for download; excludes non-official builds or undefined experimental releases; not responsible for installation on non-standard environments.