qres
A fast Qt resource compiler for Python, implemented as a C extension. Drop-in replacement for pyrcc5 / pyside6-rcc that compiles .qrc files into _rc.py modules without requiring a Qt installation.
Installation
pip install qres
Pre-built wheels are available for Linux (x86_64, aarch64), macOS (x86_64, arm64), and Windows (AMD64, ARM64) on Python 3.11+.
Usage
CLI
qres resources.qrc
qres resources.qrc -o path/to/resources_rc.py
qres resources.qrc --binding PySide6
Python API
import qres
# Compile from a file path
qres.compile_file("resources.qrc")
qres.compile_file("resources.qrc", output="resources_rc.py")
qres.compile_file("resources.qrc", binding="PySide6")
# Compile from an XML string, returns raw blobs
blobs = qres.compile(xml_string, base_dir="/path/to/qrc/dir")
# blobs: {"data": bytes, "name": bytes, "struct_v1": bytes, "struct_v2": bytes}
The generated _rc.py works with qtpy, PyQt5, PyQt6, PySide2, and PySide6. By default, it includes an automatic fallback import chain that resolves whichever Qt binding is installed in the active environment.
How it works
qres parses the .qrc XML, builds a virtual file tree sorted by Qt's hash function, compresses each asset with zlib at level 9 (skipping compression when it doesn't help or for .ico files), then serializes two binary struct formats — v1 for Qt < 5.8 and v2 for Qt >= 5.8 — into Python byte literals.
Benchmarks
Benchmarked on a 50 MB uncompressed text asset compiled into a registered Qt resource module:
| Metric | Measurement |
|---|---|
| Input payload | 50.00 MB (52,428,800 bytes) |
| Compile duration | 403 ms (0.40 s) |
| Compilation throughput | 124 MB/s |
| Generated module size | 1.23 MB (97.5% compression) |
| Qt resource read speed | 93 ms (534 MB/s) |
| Data integrity | SHA-256 verified |
Contributing
See CONTRIBUTING.md.
Building from source
Requires a C compiler.
git clone https://github.com/farhaanaliii/qres
cd qres
pip install -e .
License
MIT — see LICENSE.
1 maintainer
Metadata
1 maintainer
Release files for qres 0.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| qres-0.1.0.tar.gz | 11.1 kB | Details |
Built distributions (wheels)
Total release size: 439.5 kB
Release files / qres-0.1.0.tar.gz
| Download URL | qres-0.1.0.tar.gz |
|---|---|
| Size | 11.1 kB |
| Tags | Source |
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| Tags | CPython 3.13 Windows ARM64 |
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PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Sep 11, 2026.
Transparency log
