Traceback (most recent call last):
File "C:/Users/Administrator/Desktop/GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架/GCformer-main/GCformer-main/run_longExp.py", line 156, in
exp.train(setting)
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\exp\exp_main.py", line 98, in train
vali_data, vali_loader = self._get_data(flag='val')
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\exp\exp_main.py", line 43, in _get_data
data_set, data_loader = data_provider(self.args, flag)
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\data_provider\data_factory.py", line 45, in data_provider
print(flag, len(data_set))
ValueError: len() should return >= 0
Traceback (most recent call last):
File "C:/Users/Administrator/Desktop/GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架/GCformer-main/GCformer-main/run_longExp.py", line 156, in
exp.train(setting)
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\exp\exp_main.py", line 98, in train
vali_data, vali_loader = self._get_data(flag='val')
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\exp\exp_main.py", line 43, in _get_data
data_set, data_loader = data_provider(self.args, flag)
File "C:\Users\Administrator\Desktop\GCformer：用于准确且可扩展的长期多变量时间序列预测的有效框架\GCformer-main\GCformer-main\data_provider\data_factory.py", line 45, in data_provider
print(flag, len(data_set))
ValueError: len() should return >= 0