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Document init subclass (#305)

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docs/config_entries_config_flow_handler.md
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@ -15,15 +15,13 @@ You need to update your integrations manifest to inform Home Assistant that your
## Defining your config flow
Config entries uses the [data flow entry framework](data_entry_flow_index.md) to define their config flows. The config flow needs to be defined in the file `config_flow.py` in your integration folder.
To define it, extend the ConfigFlow base class from the config entries module, and decorate it with the `HANDLERS.register` decorator:
Config entries uses the [data flow entry framework](data_entry_flow_index.md) to define their config flows. The config flow needs to be defined in the file `config_flow.py` in your integration folder, extend `homeassistant.config_entries.ConfigFlow` and pass a `domain` key as part of inheriting `ConfigFlow`.
```python
from homeassistant import config_entries
from .const import DOMAIN
@config_entries.HANDLERS.register(DOMAIN)
class ExampleConfigFlow(config_entries.ConfigFlow):
class ExampleConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
```
## Defining steps
@ -31,8 +29,7 @@ class ExampleConfigFlow(config_entries.ConfigFlow):
Your config flow will need to define steps of your configuration flow. The docs for [Data Entry Flow](data_entry_flow_index.md) describe the different return values of a step. Here is an example on how to define the `user` step.
```python
@config_entries.HANDLERS.register(DOMAIN)
class ExampleConfigFlow(data_entry_flow.FlowHandler):
class ExampleConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
async def async_step_user(self, info):
if info is not None:
@ -49,12 +46,12 @@ class ExampleConfigFlow(data_entry_flow.FlowHandler):
There are a few step names reserved for system use:
| Step name | Description |
| --------- | ----------- |
| `user` | Invoked when a user initiates a flow via the user interface.
| `zeroconf` | Invoked if your integration has been discovered via Zeroconf/mDNS as specified [using `zeroconf` in the manifest](creating_integration_manifest.md#zeroconf).
| `homekit` | Invoked if your integration has been discovered via HomeKit as specified [using `homekit` in the manifest](creating_integration_manifest.md#homekit).
| `ssdp` | Invoked if your integration has been discovered via SSDP/uPnP as specified [using `ssdp` in the manifest](creating_integration_manifest.md#ssdp).
| `discovery` | _DEPRECATED_ Invoked if your integration has been discovered by the discovery integration.
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `user` | Invoked when a user initiates a flow via the user interface. |
| `zeroconf` | Invoked if your integration has been discovered via Zeroconf/mDNS as specified [using `zeroconf` in the manifest](creating_integration_manifest.md#zeroconf). |
| `homekit` | Invoked if your integration has been discovered via HomeKit as specified [using `homekit` in the manifest](creating_integration_manifest.md#homekit). |
| `ssdp` | Invoked if your integration has been discovered via SSDP/uPnP as specified [using `ssdp` in the manifest](creating_integration_manifest.md#ssdp). |
| `discovery` | _DEPRECATED_ Invoked if your integration has been discovered by the discovery integration. |
## Discovery steps