用元素名称替换索引，保持名称的顺序而不是索引的顺序

Posted 2023-03-12

【中文标题】用元素名称替换索引，保持名称的顺序而不是索引的顺序

【英文标题】：replace index by the element name with keeping the name's order and not the order of the index

【发布时间】：2020-10-19 20:34:18

【问题描述】：

我有一个流派列表

genres_list=['Action', 'Adventure', 'Animation', 'Children', 'Comedy']

我有一个神经网络，可以预测这部电影的类型顺序。根据预测，我保留了前 3 种类型的索引。例如，如果一部电影是 [“Animation”、“Comedy”、“Children”]，那么我将有一个类似 [2 4 3] 的预测。然后我将索引 [2 4 3] 替换为初始列表中的名称。

我当前的输出是 ["Animation", "Children", "Comedy"] 因为第一个索引是首先替换的。但由于保持正确的流派顺序（顺序）很重要，我希望我的最终输出类似于 ["Animation", "Comedy", "Children"] -> 正确的索引预测

我的函数（产生不希望的结果）

def predict_genre_tags(model, genres_list):
        
    test_sequence_actors = X_test_seq_actors[0:0+1]
    
    test_sequence_plot = X_test_seq_plot[0:0+1]
    
    test_sequence_features = X_test_seq_features[0:0+1]
    
    test_sequence_reviews = X_test_seq_reviews[0:0+1]
    
    text_prediction = model.predict([test_sequence_actors, test_sequence_plot, test_sequence_features, test_sequence_reviews])
    
    [float(i) for i in text_prediction[0]]
    
    tag_probabilities = text_prediction[0][np.argsort(text_prediction[0])[-3:]]
    
    indexes = np.argsort(text_prediction[0])[::-1][:3] #keep the genres with the top 3 probabilities and their index.
    
    print(indexes) # indexes= [2 4 3] based on my description
    
    predicted_tags = []
    
    for i, tag in enumerate(genres_list): #here is my problem...because the first inside the loop is the first replaced
        if i in indexes:
            predicted_tags.append(genres_list[i])
    
    return predicted_tags

df_predictions = pd.DataFrame('Movie Title':pd.Series("Toy Story", dtype='str'),
                               'Predicted Genre tags (top 3)':pd.Series([predict_genre_tags(model, genres_list)], dtype='str') #which yields ["Animation", "Children", "Comedy"] genres in incorrect order,
                               'Real Genre tags':pd.Series(["Animation", "Comedy", "Children"], dtype='str'))

【参考方案1】：

你可以简单地这样做predicted_tags = [genres_list[i] for i in indexes]。