小编Max*_*ter的帖子

在 Featuretools 中使用多个训练窗口计算相同的特征

Featuretools 支持已经处理多个截止时间https://docs.featuretools.com/automated_feature_engineering/handling_time.html

In [20]: temporal_cutoffs = ft.make_temporal_cutoffs(cutoffs['customer_id'],
   ....:                                             cutoffs['cutoff_time'],
   ....:                                             window_size='3d',
   ....:                                             num_windows=2)
   ....: 

In [21]: temporal_cutoffs
Out[21]: 
        time  instance_id
0 2011-12-12        13458
1 2011-12-15        13458
2 2012-10-02        13602
3 2012-10-05        13602
4 2012-01-22        15222
5 2012-01-25        15222

In [22]: entityset = ft.demo.load_retail()

In [23]: feature_tensor, feature_defs = ft.dfs(entityset=entityset,
   ....:                                       target_entity='customers',
   ....:                                       cutoff_time=temporal_cutoffs,
   ....:                                       cutoff_time_in_index=True,
   ....:                                       max_features=4)
   ....: 

In [24]: feature_tensor
Out[24]: 
                        MAX(order_products.total)  MIN(order_products.unit_price)  STD(order_products.quantity)  COUNT(order_products)
customer_id time                                                                                                                      
13458.0     2011-12-12                    201.960                          0.3135                     10.053804                    394
            2011-12-15                    201.960                          0.3135                     10.053804                    394 …
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python feature-extraction pandas feature-engineering featuretools

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