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Project Description

appsettings

Sometimes you want to read a setting from the command line. Sometimes you want to read it from an environment variable. Sometimes you want to read it from a config file.

And in some very special times, you want to allow the value to be passed using some combination of the three.

The appsettings module provides an argparse subclass that allows pulling settings from the command line, environment variables, or a yaml config file.

If the same value is provided in several of those locations, then env var always beats config file, and command line always beats everything.

Usage is exactly the same as argparse, with the addition of some new kwargs on initializing the parser and adding arguments to it. Example:

from appsettings import SettingsParser

f = open('some_config_file.yaml')
parser  = SettingsParser(yaml_file=f)

parser.add_argument('--color', default='blue', env_var='FAVCOLOR')

args = parser.parse_args()

print args.color
# If you've set the FAVCOLOR environment variable you should now see its
# value printed to the console.  Otherwise you'd see 'blue'

Things to Know

Options Only

Only long form arguments like “–color” will provide env var and config file fallbacks. Positional arguments and short options like “-c” will behave just like they do in the argparse module.

APP_SETTINGS_YAML

If you don’t provide a yaml_file argument to the SettingsParser constructor, and the APP_SETTINGS_YAML environment variable is set, then that file will be read and parsed to provide settings. (Though they’ll still be overridable by environment variables and command line options.)

Release History

Release History

0.8

This version

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0.7

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0.6

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0.5

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0.4

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0.3.2

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0.3.1

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0.3

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0.2

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0.1

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
appsettings-0.8.tar.gz (3.8 kB) Copy SHA256 Checksum SHA256 Source Apr 28, 2016

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