def attributes_desc():
    """
    return list of column descriptions
    5_o_Clock_Shadow Arched_Eyebrows Attractive Bags_Under_Eyes Bald Bangs
    Big_Lips Big_Nose Black_Hair Blond_Hair Blurry Brown_Hair Bushy_Eyebrows
    Chubby Double_Chin Eyeglasses Goatee Gray_Hair Heavy_Makeup High_Cheekbones
    Male Mouth_Slightly_Open Mustache Narrow_Eyes No_Beard Oval_Face Pale_Skin
    Pointy_Nose Receding_Hairline Rosy_Cheeks Sideburns Smiling Straight_Hair Wavy_Hair
    Wearing_Earrings Wearing_Hat Wearing_Lipstick Wearing_Necklace Wearing_Necktie Young

    :return: list[str]
    """
    columns = ['5_o_Clock_Shadow', 'Arched_Eyebrows', 'Attractive',
        'Bags_Under_Eyes', 'Bald', 'Bangs', 'Big_Lips', 'Big_Nose',
        'Black_Hair', 'Blond_Hair', 'Blurry', 'Brown_Hair',
        'Bushy_Eyebrows', 'Chubby', 'Double_Chin', 'Eyeglasses', 'Goatee',
        'Gray_Hair', 'Heavy_Makeup', 'High_Cheekbones', 'Male',
        'Mouth_Slightly_Open', 'Mustache', 'Narrow_Eyes', 'No_Beard',
        'Oval_Face', 'Pale_Skin', 'Pointy_Nose', 'Receding_Hairline',
        'Rosy_Cheeks', 'Sideburns', 'Smiling', 'Straight_Hair', 'Wavy_Hair',
        'Wearing_Earrings', 'Wearing_Hat', 'Wearing_Lipstick',
        'Wearing_Necklace', 'Wearing_Necktie', 'Young']
    return map(str.lower, columns)
