Python scorecardpy: UnboundLocalError: local variable 'card_df' referenced before assignment

Question

I used scorecardpy function to get a model:

import scorecardpy as ac
card=sc.scorecard(bins_adj, lr, X_train.columns)

Then I tried to save this model using following code:

import numpy as np
np.save('card.npy',card)

After that I tried to reload this model:

card=np.load('card.npy',allow_pickle=True)

Then I want to use the model to get the scores:

score=sc.scorecard_ply(data_train, card, print_step=0)

But it gives error:

UnboundLocalError          Traceback (most recent call last)
Cell In [91], line 1
score=sc.scorecard_ply(data_train, card, print_step=0)

File ~/.local/lib/python3.9/site-packages/scorecardpy/scorecard.py:330, in scorecard_ply(dt, card, only_total_score, print_step, replace_blank_na, var_kp)
     card_df=card.copy(deep=True)
  # x variables
  xs=card_df.loc[card_df.variable != 'basepoints', 'variable'].unique()
  # length of x variables
  xs_len=len(xs)
  
UnboundLocalError: local variable 'card_df' referenced before assignment

How to resolve this problem?

This is (apparently) a bug inside the scorecard module. What version are you using, and is there a newer one available that might fix the bug? — John Gordon
– John Gordon, Commented Nov 24, 2024 at 4:24

Starship · Accepted Answer · 2024-11-29 21:03:50Z

-1

Using Joblib instead of Numpy will solve this problem. Remember to place import joblib at the start of your program, and replace

import numpy as np
np.save('card.npy',card)
card=np.load('card.npy',allow_pickle=True)

with

joblib.dump(card, 'card.joblib')
card = joblib.load('card.joblib')

This should not give you any errors.

answered Nov 29, 2024 at 21:03

Starship

1,3164 gold badges18 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python scorecardpy: UnboundLocalError: local variable 'card_df' referenced before assignment

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related