TypeError: 'JavaPackage' object is not callable

[姚艳华]

Hello,  I have download the sparkts. And I use python but I have a error when create  timeseriesrdd.

Traceback (most recent call last):

  File "/Users/wangyudong/PycharmProjects/dastudio_octopus/code/model/dacomponent/ttt.py", line 21, in <module>

    time_series_rdd_from_observations(dt_index,df,'year','project','income')

  File "/Users/wangyudong/anaconda3/lib/python3.7/site-packages/sparkts-0.4.0-py3.7.egg/sparkts/timeseriesrdd.py", line 236, in time_series_rdd_from_observations

    dt_index._jdt_index, df._jdf, ts_col, key_col, val_col)

TypeError: 'JavaPackage' object is not callable

Process finished with exit code 1

thanks very mush.