文件样本是：

window_fm, window_features = ft.dfs(entityset=es,
   ....:                                     target_entity="customers",
   ....:                                     cutoff_time=cutoff_times,
   ....:                                     cutoff_time_in_index=True,
   ....:                                     training_window="1 hour")

当我更改参数trainging_window = '90分钟'时，如

window_fm, window_features = ft.dfs(entityset=es,
   ....:                                     target_entity="customers",
   ....:                                     cutoff_time=cutoff_times,
   ....:                                     cutoff_time_in_index=True,
   ....:                                     training_window="90 minute")

我得到了这个结果：window_fm

Out[144]: 
            zip_code  COUNT(sessions)  COUNT(transactions)  label
customer_id                                                      
1              60091                3                   32      0
2              02139                3                   36      0
3              02139                1                    7      1
4              60091                0                    0      0
5              02139                1                   15      1

当我检查数据时，customer_id = 1，COUNT（会话）似乎是2，而不是3.这是一个错误吗？或者我错了？

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