# `_dl` Module (Internal Colab Utility)

This internal module provides a utility function specifically for use within Google Colab environments to facilitate downloading project files.

## Functions

### `create_downloadable_zip`

```python
def create_downloadable_zip(
    excluded_files: list,
    zip_name: str = 'Model_files.zip'
) -> None:
```

Creates a zip archive of the `/content` directory (the default root directory in Google Colab), excluding specified files or patterns, and then initiates a file download prompt in the Colab interface.

**Parameters:**

-   `excluded_files` (`list`): A list of strings representing filenames or patterns to exclude from the zip archive (e.g., `"drive"`, `"sample_data"`). The patterns are used with the `zip -x` command.
-   `zip_name` (`str`, optional): The desired name for the output zip file. Defaults to `'Model_files.zip'`.

**Returns:**

-   `None`: The function executes system commands and triggers a download via `google.colab.files.download`.

**Notes:**

-   This function relies on the `zip` command-line utility being available in the environment.
-   It specifically imports and uses `google.colab.files`, meaning it will only function correctly within a Google Colab notebook session.
-   The script part of `_dl.py` calls this function with a predefined list of exclusions (`"drive"`, `"sample_data"`).