def save_descriptions(descriptions, filename):
    """
    Save descriptions to file, one per line.

    :params dict descriptions: descriptions
    :params str filename: path including file name
    """
    lines = list()
    for key, desc_list in descriptions.items():
        for desc in desc_list:
            lines.append(key + ' ' + desc)
    data = '\n'.join(lines)
    file = open(filename, 'w')
    file.write(data)
    file.close()
