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# Access to devices on the host
If you need to directly expose some host devices to a container, you can use
the devices parameter in the `host_config` param in `Client.create_container`
as shown below:
```python
cli.create_container(
'busybox', 'true', host_config=cli.create_host_config(devices=[
'/dev/sda:/dev/xvda:rwm'
])
)
```
Each string is a single mapping using the following format:
`<path_on_host>:<path_in_container>:<cgroup_permissions>`
The above example allows the container to have read-write access to
the host's `/dev/sda` via a node named `/dev/xvda` inside the container.
As a more verbose alternative, each host device definition can be specified as
a dictionary with the following keys:
```python
{
'PathOnHost': '/dev/sda1',
'PathInContainer': '/dev/xvda',
'CgroupPermissions': 'rwm'
}
```
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