forecast() takes 1 positional argument but 2 were given #3

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1. RSerSYQ commented on Jan 8, 2021

   

   RSerSYQ

   on Jan 8, 2021

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   Did you solve this question？I have met the same question, thanks!
2. Kalvar commented on Jan 8, 2021

   

   Kalvar

   on Jan 8, 2021

   Last edited by Kalvar

   Owner

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   Hi, It works for:
   gm11.period = 2
   gm11.forecast()

   And thanks to open an issue to inform me this jotting code, I will find another time to optimize the algorithm.

   👍React with 👍1Reacted by Muhammad Zubair
3. muhdzubair commented on Jan 11, 2021

   

   muhdzubair

   on Jan 11, 2021

   Author

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   Hi, It works for:
   gm11.period = 2
   gm11.forecast()

   And thanks to open an issue to inform me this jotting code, I will find another time to optimize the algorithm.

   Yes it worked! 😊

   Now I am wondering how to get forecast values as print_forecasted_results() only print original and forecast values from self.analyzed_results as checked in grey_class.py

   @Kalvar if you can guide. Thanks.
4. no-trick-pony commented on Feb 19, 2021

   

   no-trick-pony

   on Feb 19, 2021

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   @muhdzubair

   Now I am wondering how to get forecast values as print_forecasted_results() only print original and forecast values from self.analyzed_results as checked in grey_class.py

   If you look at the gm11 class and the forecast method there, you will see that it returns the output of the internal __forecast method, which is an array of grey_forecast objects - see: https://github.com/Kalvar/python-GreyTheory/blob/master/greytheory/packages/models/grey_forecast.py

   So you can simply do:

   results = gm11.forecast()
   
   for r in results:
       print(r.forecast_value)
   

   gm11 also stores the result internally, so you could also do:

   gm11.forecast()
   
   for r in gm11.analyzed_results:
       print(r.forecast_value)
   
5. Kalvar

   added a commit that references this issue on Oct 21, 2026

   Restore legacy GM11 forecast calls and cover reported zero cases

   ...

   14f7b53