didactic-settings
didactic-settings loads typed application settings into a dx.Model. It adds
the didactic.settings module with sources for environment variables, dotenv
files, JSON, TOML, YAML, and parsed command-line arguments.
Install
pip install didactic-settings
pip install 'didactic-settings[yaml]'
The yaml extra installs PyYAML for .yaml and .yml files.
Load settings
from didactic.settings import EnvSource, FileSource, Settings
class AppSettings(Settings):
db_url: str
debug: bool = False
port: int = 8080
__sources__ = (
FileSource(path="config.toml"),
EnvSource(prefix="APP_"),
)
settings = AppSettings.load(db_url="postgresql://localhost/app")
source = settings.__provenance__["port"]
AppSettings.load() reads the declared sources, applies keyword overrides, and
then validates the result as a Didactic model. __provenance__ records whether
each value came from a source, a default, or a keyword override.
Source precedence
Sources run in declaration order. A later source overrides values supplied by
an earlier one, and keyword arguments to Settings.load(...) take final
precedence.
| Source | Input |
|---|---|
EnvSource(prefix="APP_") |
environment variables |
DotEnvSource(path=".env", prefix="APP_") |
a dotenv file |
FileSource(path="config.toml") |
JSON, TOML, or YAML selected by suffix |
CliSource(args=namespace) |
an argparse.Namespace or mapping |
Because Settings extends dx.Model, loaded values receive the same type
checks, axioms, field validators, and indexed-field checks as other Didactic
models.
Documentation
See the settings guide for source configuration, coercion rules, and provenance reporting.
License
Released under the MIT License.
1 maintainer
Metadata
1 maintainer
Release files for didactic-settings 0.16.0
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Source distribution (sdist)
| File | Size | Uploaded | |
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| didactic_settings-0.16.0.tar.gz | 5.9 kB | Details |
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| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| didactic_settings-0.16.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 12.7 kB
Release files / didactic_settings-0.16.0.tar.gz
| Download URL | didactic_settings-0.16.0.tar.gz |
|---|---|
| Size | 5.9 kB |
| Tags | Source |
|
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| Download URL | didactic_settings-0.16.0-py3-none-any.whl |
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| Size | 6.8 kB |
| Tags | Python 3 |
|
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| Uploaded via |
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|
Provenance
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PyPI Publish Attestation
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