module 'pandas' has no attribute 'rolling_std'

>>> s = pd.Series([5, 5, 6, 7, 5, 5, 5])
>>> s.rolling(3).std()
2 module 'pandas' has no attribute 'ewma'

使用series.ewm(span)



3 module 'pandas' has no attribute 'rolling_mean' 

#rolmean = pd.rolling_mean(timeseries, window=12)  #对size个数据进行移动平均

rolmean = timeseries.rolling(window=12).mean()  #对size个数据进行移动平均