prophet: ValueError: Dataframe has less than 2 non-NaN rows.

I am new to using prophet and trying to run the model in a “for loop”. After few iterations I get a “ValueError: Dataframe has less than 2 non-NaN rows.”

Below is my code:

`prediction = {} df2 = df2.rename(columns={‘Date of the document’: ‘ds’,‘Quantity sold’: ‘y’, ‘Article bar code’: ‘article’}) list_articles = df2.article.unique()

for article in list_articles: article_df = df2.loc[df2[‘article’] == article] my_model = Prophet(weekly_seasonality= True, daily_seasonality=True,yearly_seasonality=True) my_model.fit(article_df) future_dates = my_model.make_future_dataframe(periods=12, freq=‘MS’) forecast = my_model.predict(future_dates) prediction[article] = forecast return prediction`

Below is the error that appears:

File “<ipython-input-101-a0f1073a32cb>”, line 5, in <module> my_model.fit(article_df)

File "C:\Anaconda\lib\site-packages\fbprophet\forecaster.py", line 775, in fit
raise ValueError('Dataframe has less than 2 non-NaN rows.')

ValueError: Dataframe has less than 2 non-NaN rows.

Attaching the screenshot of the error function: