> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prefect.io/llms.txt
> Use this file to discover all available pages before exploring further.

# plugins

# `prefect.settings.models.plugins`

## Classes

### `PluginsSettings` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/settings/models/plugins.py#L49" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Settings for configuring the plugin system.

Each field also accepts the legacy `PREFECT_EXPERIMENTS_PLUGINS_*` env-var
name. The system warns once at import time when any of those legacy names
is present in the environment. Legacy `[experiments.plugins]` TOML tables
are read as a lower-priority fallback for the same backward-compat reason.

**Methods:**

#### `settings_customise_sources` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/settings/models/plugins.py#L62" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
settings_customise_sources(cls, settings_cls: Type[BaseSettings], init_settings: PydanticBaseSettingsSource, env_settings: PydanticBaseSettingsSource, dotenv_settings: PydanticBaseSettingsSource, file_secret_settings: PydanticBaseSettingsSource) -> tuple[PydanticBaseSettingsSource, ...]
```

#### `settings_customise_sources` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/settings/base.py#L33" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
settings_customise_sources(cls, settings_cls: type[BaseSettings], init_settings: PydanticBaseSettingsSource, env_settings: PydanticBaseSettingsSource, dotenv_settings: PydanticBaseSettingsSource, file_secret_settings: PydanticBaseSettingsSource) -> tuple[PydanticBaseSettingsSource, ...]
```

Define an order for Prefect settings sources.

The order of the returned callables decides the priority of inputs; first item is the highest priority.

See [https://docs.pydantic.dev/latest/concepts/pydantic\_settings/#customise-settings-sources](https://docs.pydantic.dev/latest/concepts/pydantic_settings/#customise-settings-sources)

#### `to_environment_variables` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/settings/base.py#L124" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
to_environment_variables(self, exclude_unset: bool = False, include_secrets: bool = True, include_aliases: bool = False) -> dict[str, str]
```

Convert the settings object to a dictionary of environment variables.