Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Default value for missing environment variables in yaml and ini config files

See original GitHub issue

How could I specify a default value for the missing environment variable in the configuration provider?

For example: pseudo code

config = dependency_injector.providers.Configuration()
config.from_yaml("conf.yml")

print(config.some_key.size)  -> will print ${SOME_KEY_SIZE} if envvar is missing

conf file

some_key:
     size: ${SOME_KEY_SIZE}

or maybe we could leave such cases with empty/none values? for e.g.

config.some_key.size  -> will be None

Issue Analytics

State:
Created 2 years ago
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

rmk135commented, Jun 11, 2021

Well, yeah, I agree. I think I can implement it.

1reaction

rmk135commented, Jun 7, 2021

Hi @hbmshemet. Yeah, reasonable concern. I’ll check what’s going on in the code.

Top Results From Across the Web

Use environment variables in the configuration - Elastic

Each variable reference is replaced at startup by the value of the environment variable. The replacement is case-sensitive and occurs before the YAML...

Python, application configuration : environment variables, ini ...

In this chapter, how to read (write) configuration data with Python from environment variables, INI files with configparser and YAML files ...

Using Environment Variables in Python for App Configuration ...

Learn how experienced developers use environment variables in Python, including managing default values and typecasting.

Load config from file & environment variables in Golang with ...

It can find, load, and unmarshal values from a config file. It supports many types of files, such as JSON, TOML, YAML, ENV,...

Settings and Environment Variables - FastAPI

If not provided, it's None by default, here we provide "World" as the default value to use. Then you could call that Python...