## Get Span

`spans.retrieve(strspan_id)  -> Span`

**get** `/spans/{span_id}`

Get a span by ID

### Parameters

- `span_id: str`

### Returns

- `class Span: …`

  - `id: str`

  - `name: str`

    Name that describes what operation this span represents

  - `start_time: datetime`

    The time the span started

  - `trace_id: str`

    Unique identifier for the trace this span belongs to

  - `data: Optional[Union[Dict[str, object], List[Dict[str, object]], null]]`

    Any additional metadata or context for the span

    - `Dict[str, object]`

    - `List[Dict[str, object]]`

  - `end_time: Optional[datetime]`

    The time the span ended

  - `input: Optional[Union[Dict[str, object], List[Dict[str, object]], null]]`

    Input parameters or data for the operation

    - `Dict[str, object]`

    - `List[Dict[str, object]]`

  - `output: Optional[Union[Dict[str, object], List[Dict[str, object]], null]]`

    Output data resulting from the operation

    - `Dict[str, object]`

    - `List[Dict[str, object]]`

  - `parent_id: Optional[str]`

    ID of the parent span if this is a child span in a trace

  - `task_id: Optional[str]`

    ID of the task this span belongs to

### Example

```python
import os
from agentex import Agentex

client = Agentex(
    api_key=os.environ.get("AGENTEX_SDK_API_KEY"),  # This is the default and can be omitted
)
span = client.spans.retrieve(
    "span_id",
)
print(span.id)
```

#### Response

```json
{
  "id": "id",
  "name": "name",
  "start_time": "2019-12-27T18:11:19.117Z",
  "trace_id": "trace_id",
  "data": {
    "foo": "bar"
  },
  "end_time": "2019-12-27T18:11:19.117Z",
  "input": {
    "foo": "bar"
  },
  "output": {
    "foo": "bar"
  },
  "parent_id": "parent_id",
  "task_id": "task_id"
}
```