Provider Manager

Each instance of a ConfigurationRegistry has a ProviderManager as its providers attribute. The manager keeps track of the providers that the registry will use to resolve its final configuration values.

To add a provider, call the register() method of the manager, passing in an object that implements ConfigProviderBase.

Registering a provider does two things:

• Adds the provider instance as an attribute of the manager, named after the provider’s provider_name.

• Appends the the provider_name to the manager’s ordering attribute

To remove a provider, simply call deregister() with the provider_name, and the reverse process will be performed.

Merge Order

When assembling the final configuration dictionary, the manager’s ordering property determines the order in which providers are merged. By default the most recently registered provider has the highest precedence.

You can update the ordering attribute to change the order in which provider dictionaries are merged (just like any other Python list).