viaenv - Configuration via Environment for Python

viaenv uses variable annotation to populate values from environment variables.

Example

from datetime import timedelta
from viaenv import populate_from_env


class config:
    port: int = 8080
    log_file: str = '/var/log/server.log'
    timeout: timedelta = timedelta(milliseconds=100)


populate_from_env(
    config, prefix='SRV',
    # If you don't pass env, populate_from_env will use os.environ
    env={'SRV_PORT': '9000', 'SRV_TIMEOUT': '300ms'})

print(config.port)  # 9000
print(cfg.timeout == timedelta(milliseconds=300)  # True

Supported Types

bool: y, yes, t, true, on, 1 -> True, n, no, f, false, off, 0 -> False
date: 2019-05-18
datetime: 2019-05-18T13:43:12
dict: {"x": 1, "y": 2} (JSON format)
float: 1.3, 1e7
int: 12, 0x12, 0o12, 0b12
list: [1, 2, 3] (JSON format)
str: Anything goes
time: 13:43:12
timedelta: 10us, 20ms, 30s, 17m, 2h, 7d, 1h20m

You can add your types by calling register_type_parser(typ, parser) where typ is a type (e.g. float) and parser is a one argument function that will get the value as a string.

Release files for viaenv 0.2.1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for viaenv 0.2.1
File	Size	Uploaded
viaenv-0.2.1.tar.gz	4.8 kB	Aug 28, 2019	Details

Release files / viaenv-0.2.1.tar.gz

Download URL	viaenv-0.2.1.tar.gz
Size	4.8 kB
Tags	Source
SHA-256 checksum How to use checksums	`f1de70355a7e16f54aebb3bb9cb95e82deb206a92130d1ba526d1bac82ae1e6d`
BLAKE2b-256 checksum How to use checksums	`09e7ee21ea275d503b553381e570c1e340f76e961c7498545e26a31297b4761f`
Upload date	Aug 28, 2019
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/1.13.0 pkginfo/1.5.0.1 requests/2.22.0 setuptools/41.1.0 requests-toolbelt/0.9.1 tqdm/4.34.0 CPython/3.7.4`