Add example

examples/providers/configuration/configuration_pydantic_init.py

@@ -0,0 +1,35 @@
+"""`Configuration` provider values loading example."""
+
+import os
+
+from dependency_injector import containers, providers
+from pydantic import BaseSettings, Field
+
+# Emulate environment variables
+os.environ["AWS_ACCESS_KEY_ID"] = "KEY"
+os.environ["AWS_SECRET_ACCESS_KEY"] = "SECRET"
+
+
+class AwsSettings(BaseSettings):
+
+    access_key_id: str = Field(env="aws_access_key_id")
+    secret_access_key: str = Field(env="aws_secret_access_key")
+
+
+class Settings(BaseSettings):
+
+    aws: AwsSettings = AwsSettings()
+    optional: str = Field(default="default_value")
+
+
+class Container(containers.DeclarativeContainer):
+
+    config = providers.Configuration(pydantic_settings=[Settings()])
+
+
+if __name__ == "__main__":
+    container = Container()
+
+    assert container.config.aws.access_key_id() == "KEY"
+    assert container.config.aws.secret_access_key() == "SECRET"
+    assert container.config.optional() == "default_value"