ValueError: If using all scalar values, you must pass an index in python

Question

I got a value error when i use ramdom forest to do the prediction. i have attached the code and error message below

thank you

Answer 1

Hello!

First of all reason why this problem occurs is as Pandas is expecting the data values to be list values or dict values. I don't know what is your values exactly however, you can give the dataframe object index parameter to get rid of this simple problem.

Firstly create a list of arbitrary numbers

numbers = pd.Index(range(max(y_test, y_pred))

than add this line to use these indexes.

df = df.set_index(numbers)