How to get sys.files through nodes?

[DDDU123]

How to get sys.files through nodes?

[dosubot[bot]]

To retrieve the sys.files variable, which is an Array of File objects, through nodes in the system, you can use the _fetch_files method defined in the LLMNode class. This method fetches the files from the variable_pool if the vision is enabled in the node_data.

Here is the relevant code snippet:

def _fetch_files(self, node_data: LLMNodeData, variable_pool: VariablePool) -> list[FileVar]:
    """
    Fetch files
    :param node_data: node data
    :param variable_pool: variable pool
    :return:
    """
    if not node_data.vision.enabled:
        return []

    files = variable_pool.get_variable_value(['sys', SystemVariable.FILES.value])
    if not files:
        return []

    return files

To use this method, ensure that the vision is enabled in the node_data. Then, call _fetch_files with the appropriate node_data and variable_pool to retrieve the files.

Additionally, in the Dify platform, the sys.files variable is defined as part of the StartNodeType and is of type VarType.arrayFile. This ensures that the variable is recognized and can be used within the workflow nodes ^[1][2][3].

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[alvp]

@dosu
What do I have to import to use LLMNodeData and VariablePool?