py-rattler-build

Python bindings for Rattler-Build, the fast conda package builder.

py-rattler-build lets you build, inspect, test, and upload conda packages directly from Python — no subprocess calls needed.

Quick start

Build a package from a recipe

from rattler_build import Stage0Recipe, VariantConfig

recipe = Stage0Recipe.from_file("recipe.yaml")
results = recipe.run_build()

for result in results:
    print(f"Built {result.name} {result.version} in {result.build_time:.1f}s")
    for pkg in result.packages:
        print(f"  {pkg}")

Render and build with variants

from rattler_build import Stage0Recipe, VariantConfig

recipe = Stage0Recipe.from_file("recipe.yaml")
rendered_variants = recipe.render(VariantConfig())

for variant in rendered_variants:
    result = variant.run_build()

Inspect an already built package

from rattler_build import Package

pkg = Package.from_file("mypackage-1.0.0-py312h0_0.conda")
print(f"{pkg.name} {pkg.version} ({pkg.platform})")
print(f"Dependencies: {pkg.depends}")
print(f"Files: {len(pkg.files)}")

Test a package

from rattler_build import Package

pkg = Package.from_file("mypackage-1.0.0-py312h0_0.conda")
results = pkg.run_tests()

Generate a recipe from PyPI

from rattler_build import generate_pypi_recipe

recipe_yaml = generate_pypi_recipe("requests", version="2.31.0")
print(recipe_yaml)

Build with progress reporting

from rattler_build import Stage0Recipe, VariantConfig
from rattler_build.progress import RichProgressCallback

recipe = Stage0Recipe.from_file("recipe.yaml")
rendered_variants = recipe.render(VariantConfig())

for variant in rendered_variants:
    with RichProgressCallback(show_logs=True) as callback:
        result = variant.run_build(progress_callback=callback)

Documentation

For the full reference, check out our website.

Project links

Data verified by PyPI on Aug 13, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Latest release

2 maintainers

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Credits

Author: Wolf Vollprecht

GitHub Statistics

Data verified by PyPI on Aug 13, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

BSD-3-Clause
View SPDX License List

Requires

Python >=3.10

Classifiers

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