> ## Documentation Index
> Fetch the complete documentation index at: https://e2b-banner-hover-tooltip.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Template async

## AsyncTemplate

```python theme={null}
class AsyncTemplate(TemplateBase)
```

Asynchronous template builder for E2B sandboxes.

### build

```python theme={null}
@staticmethod
async def build(template: TemplateClass,
                alias: str,
                cpu_count: int = 2,
                memory_mb: int = 1024,
                skip_cache: bool = False,
                on_build_logs: Optional[Callable[[LogEntry], None]] = None,
                **opts: Unpack[ApiParams]) -> BuildInfo
```

Build and deploy a template to E2B infrastructure.

**Arguments**:

* `template`: The template to build
* `alias`: Alias name for the template
* `cpu_count`: Number of CPUs allocated to the sandbox
* `memory_mb`: Amount of memory in MB allocated to the sandbox
* `skip_cache`: If True, forces a complete rebuild ignoring cache
* `on_build_logs`: Callback function to receive build logs during the build process
  Example

```python theme={null}
from e2b import AsyncTemplate

template = (
    AsyncTemplate()
    .from_python_image('3')
    .copy('requirements.txt', '/home/user/')
    .run_cmd('pip install -r /home/user/requirements.txt')
)

await AsyncTemplate.build(
    template,
    alias='my-python-env',
    cpu_count=2,
    memory_mb=1024
)
```

### build\_in\_background

```python theme={null}
@staticmethod
async def build_in_background(template: TemplateClass,
                              alias: str,
                              cpu_count: int = 2,
                              memory_mb: int = 1024,
                              skip_cache: bool = False,
                              on_build_logs: Optional[Callable[[LogEntry],
                                                               None]] = None,
                              **opts: Unpack[ApiParams]) -> BuildInfo
```

Build and deploy a template to E2B infrastructure without waiting for completion.

**Arguments**:

* `template`: The template to build
* `alias`: Alias name for the template
* `cpu_count`: Number of CPUs allocated to the sandbox
* `memory_mb`: Amount of memory in MB allocated to the sandbox
* `skip_cache`: If True, forces a complete rebuild ignoring cache

**Returns**:

BuildInfo containing the template ID and build ID
Example

```python theme={null}
from e2b import AsyncTemplate

template = (
    AsyncTemplate()
    .from_python_image('3')
    .run_cmd('echo "test"')
    .set_start_cmd('echo "Hello"', 'sleep 1')
)

build_info = await AsyncTemplate.build_in_background(
    template,
    alias='my-python-env',
    cpu_count=2,
    memory_mb=1024
)
```

### get\_build\_status

```python theme={null}
@staticmethod
async def get_build_status(build_info: BuildInfo,
                           logs_offset: int = 0,
                           **opts: Unpack[ApiParams])
```

Get the status of a build.

**Arguments**:

* `build_info`: Build identifiers returned from build\_in\_background
* `logs_offset`: Offset for fetching logs

**Returns**:

TemplateBuild containing the build status and logs
Example

```python theme={null}
from e2b import AsyncTemplate

build_info = await AsyncTemplate.build_in_background(template, alias='my-template')
status = await AsyncTemplate.get_build_status(build_info, logs_offset=0)
```

### alias\_exists

```python theme={null}
@staticmethod
async def alias_exists(alias: str, **opts: Unpack[ApiParams]) -> bool
```

Check if a template with the given alias exists.

**Arguments**:

* `alias`: Template alias to check

**Returns**:

True if the alias exists, False otherwise
Example

```python theme={null}
from e2b import AsyncTemplate

exists = await AsyncTemplate.alias_exists('base')
if exists:
    print('Template exists!')
```

### check\_alias\_exists

```python theme={null}
async def check_alias_exists(client: AuthenticatedClient, alias: str) -> bool
```

Check if a template with the given alias exists.

**Arguments**:

* `client` - Authenticated API client
* `alias` - Template alias to check

**Returns**:

True if the alias exists, False otherwise