> ## Documentation Index
> Fetch the complete documentation index at: https://cdktn.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Python: CosBackendAssumeRole

> CDKTN Core API Reference for CosBackendAssumeRole in Python.

## Initializer <a name="Initializer" id="cdktn.CosBackendAssumeRole.Initializer" />

```python theme={null}
import cdktn

cdktn.CosBackendAssumeRole(
  role_arn: str,
  session_duration: typing.Union[int, float],
  session_name: str,
  policy: typing.Any = None
)
```

## Properties <a name="Properties" id="Properties" />

| **Name**                                                                                          | **Type**                               | **Description**                                                         |
| ------------------------------------------------------------------------------------------------- | -------------------------------------- | ----------------------------------------------------------------------- |
| <code><a href="#cdktn.CosBackendAssumeRole.property.roleArn">role\_arn</a></code>                 | <code>str</code>                       | (Required) The ARN of the role to assume.                               |
| <code><a href="#cdktn.CosBackendAssumeRole.property.sessionDuration">session\_duration</a></code> | <code>typing.Union\[int, float]</code> | (Required) The duration of the session when making the AssumeRole call. |
| <code><a href="#cdktn.CosBackendAssumeRole.property.sessionName">session\_name</a></code>         | <code>str</code>                       | (Required) The session name to use when making the AssumeRole call.     |
| <code><a href="#cdktn.CosBackendAssumeRole.property.policy">policy</a></code>                     | <code>typing.Any</code>                | (Optional) A more restrictive policy when making the AssumeRole call.   |

***

### `role_arn`<sup>Required</sup> <a name="role_arn" id="cdktn.CosBackendAssumeRole.property.roleArn" />

```python theme={null}
role_arn: str
```

* *Type:* str

(Required) The ARN of the role to assume.

It can be sourced from the TENCENTCLOUD\_ASSUME\_ROLE\_ARN.

***

### `session_duration`<sup>Required</sup> <a name="session_duration" id="cdktn.CosBackendAssumeRole.property.sessionDuration" />

```python theme={null}
session_duration: typing.Union[int, float]
```

* *Type:* typing.Union\[int, float]

(Required) The duration of the session when making the AssumeRole call.

Its value ranges from 0 to 43200(seconds), and default is 7200 seconds.
It can be sourced from the TENCENTCLOUD\_ASSUME\_ROLE\_SESSION\_DURATION.

***

### `session_name`<sup>Required</sup> <a name="session_name" id="cdktn.CosBackendAssumeRole.property.sessionName" />

```python theme={null}
session_name: str
```

* *Type:* str

(Required) The session name to use when making the AssumeRole call.

It can be sourced from the TENCENTCLOUD\_ASSUME\_ROLE\_SESSION\_NAME.

***

### `policy`<sup>Optional</sup> <a name="policy" id="cdktn.CosBackendAssumeRole.property.policy" />

```python theme={null}
policy: typing.Any
```

* *Type:* typing.Any

(Optional) A more restrictive policy when making the AssumeRole call.

Its content must not contains principal elements.
Please refer to [policies syntax logic](https://www.tencentcloud.com/document/product/598/10603).

***