error in fbprophet

[sveto4ka]

Please, help with the error
My code:

df_train = pd.read_csv('C:\\train.csv', parse_dates=['date'])
df_train.rename(columns={'date': 'ds', 'sales': 'y'}, inplace=True)

df_trainds = df_train.pivot_table('y', index='ds',  aggfunc='sum')

df_trainds.reset_index(level=0, inplace=True)
df_trainds.head()

m = Prophet(daily_seasonality = True)
m.fit(df_trainds)

Error:

Error:
TypeErrorTraceback (most recent call last)
<ipython-input-37-df4c0da508bd> in <module>()
     16 
     17 m = Prophet(daily_seasonality = True)
---> 18 m.fit(df_trainds)
     19 
     20 

C:\Anaconda\lib\site-packages\fbprophet\forecaster.pyc in fit(self, df, **kwargs)
   1001             try:
   1002                 params = model.optimizing(
-> 1003                     dat, init=stan_init, iter=1e4, **kwargs)
   1004             except RuntimeError:
   1005                 params = model.optimizing(

C:\Anaconda\lib\site-packages\pystan\model.pyc in optimizing(self, data, seed, init, sample_file, algorithm, verbose, as_vector, **kwargs)
    509             data = {}
    510         seed = pystan.misc._check_seed(seed)
--> 511         fit = self.fit_class(data, seed)
    512 
    513         m_pars = fit._get_param_names()

stanfit4anon_model_db8febf10f23d7fa27a62fbcfd7f17b2_1845989711.pyx in stanfit4anon_model_db8febf10f23d7fa27a62fbcfd7f17b2_1845989711.StanFit4Model.__init__()

TypeError: __init__() takes exactly 1 positional argument (2 given)

[sveto4ka]

The proplem was solved by downgrading version of pystan to 14.0 (I had 19.0, while fbprophet was version 3.0)