# blocks-since-last-update (/docs/query/blocks-since-last-update)

(mechanism 0), or None.

On commit-reveal subnets LastUpdate is bumped at commit time, not when
the weights are revealed and applied. None means the subnet has no
LastUpdate vector or the uid does not exist. The standard "is this
validator still setting weights" health check.

**Category:** Epochs & timing

## Parameters [#parameters]

| Parameter | Type    | Description                       |
| --------- | ------- | --------------------------------- |
| `netuid`  | integer | Subnet to query.                  |
| `uid`     | integer | UID of the neuron on that subnet. |

## CLI [#cli]

```bash
btcli query blocks-since-last-update --netuid <integer> --uid <integer> --json
```

## Python [#python]

```python
import bittensor as sub

async with sub.Client("finney") as client:
    result = await client.read("blocks_since_last_update", netuid=1, uid=1)
```