def process_datasets(datasets):
    """Return a list of datasets provided as a string
       in GUI input or None if default 'All' is provided.

    Args:
      datasets (str): a string with coma-separated datasets names

    Example:
      >>> process_datasets("Data1,Data2")
      ['Data1', 'Data2']
      
    """
    if datasets != "All":
        return [dataset.strip() for dataset in datasets.split(",")]
    return None