developers.home-assistant/docs/core/entity/lock.md

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---
title: Lock entity
sidebar_label: Lock
---
A lock entity is able to be locked and unlocked. Locking and unlocking can optionally be secured with a user code. Some locks also allow for opening of latches, this may also be secured with a user code. Derive a platform entity from [`homeassistant.components.lock.LockEntity`](https://github.com/home-assistant/core/blob/dev/homeassistant/components/lock/__init__.py).
## Properties
:::tip
Properties should always only return information from memory and not do I/O (like network requests). Implement `update()` or `async_update()` to fetch data.
:::
| Name | Type | Default | Description
| ---- | ---- | ------- | -----------
| changed_by | string | None | Describes what the last change was triggered by.
| code_format | string | None | Regex for code format or None if no code is required.
| is_locked | bool | None | Indication of whether the lock is currently locked. Used to determine `state`.
| is_locking | bool | None | Indication of whether the lock is currently locking. Used to determine `state`.
| is_unlocking | bool | None | Indication of whether the lock is currently unlocking. Used to determine `state`.
| is_jammed | bool | None | Indication of whether the lock is currently jammed. Used to determine `state`.
| is_opening | bool | None | Indication of whether the lock is currently opening. Used to determine `state`.
| is_open | bool | None | Indication of whether the lock is currently open. Used to determine `state`.
### States
The state is defined by setting the above properties. The resulting state is using the `LockState` enum to return one of the below members.
| Value | Description |
|-------------|--------------------------------------------------------------------|
| `LOCKED` | The lock is locked. |
| `LOCKING` | The lock is locking. |
| `UNLOCKING` | The lock is unlocking. |
| `UNLOCKED` | The lock is unlocked. |
| `JAMMED` | The lock is currently jammed. |
| `OPENING` | The lock is opening. |
| `OPEN` | The lock is open. |
## Supported features
Supported features are defined by using values in the `LockEntityFeature` enum
and are combined using the bitwise or (`|`) operator.
| Value | Description |
| ------ | ------------------------------------------ |
| `OPEN` | This lock supports opening the door latch. |
## Methods
### Lock
```python
class MyLock(LockEntity):
def lock(self, **kwargs):
"""Lock all or specified locks. A code to lock the lock with may optionally be specified."""
async def async_lock(self, **kwargs):
"""Lock all or specified locks. A code to lock the lock with may optionally be specified."""
```
### Unlock
```python
class MyLock(LockEntity):
def unlock(self, **kwargs):
"""Unlock all or specified locks. A code to unlock the lock with may optionally be specified."""
async def async_unlock(self, **kwargs):
"""Unlock all or specified locks. A code to unlock the lock with may optionally be specified."""
```
### Open
Only implement this method if the flag `SUPPORT_OPEN` is set.
```python
class MyLock(LockEntity):
def open(self, **kwargs):
"""Open (unlatch) all or specified locks. A code to open the lock with may optionally be specified."""
async def async_open(self, **kwargs):
"""Open (unlatch) all or specified locks. A code to open the lock with may optionally be specified."""
```