我正在使用SOAP webservices进行解析。当我点击请求时，它返回null。请帮忙
In [9]:
resampled = df.resample('1min').mean()
empty_df = pd.DataFrame({'value':resampled}, index = resampled.index)
empty_df
Out[9]:
value
timestamp
2016-08-09 11:55:00 1779.87