def get_items_features_tuple(item, categories):
    """ Get the item's feature and return a tuple
    Arg:
        item: one item line in the dataframe
        categories: item features list
    Returns:
        Tuple(item id string, dict{item feature: feature value})
    """

    item.tolist()
    item_id = item[1]
    features_ind = item[10:]
    features = {}
    for i in range(len(features_ind)):
        features[categories[i]] = float(features_ind[i])
    return (item_id, features)