Getting a ValueError after running the LabelEncoder command

Question

I'm working on a ML webapp and am training data from a CSV file. When converting the data array to float the ValueError appears

CODE X[:, 0] = le_country.transform(X[:,0]) X[:, 1] = le_education.transform(X[:,1]) X = X.astype(float) X

ERROR

During handling of the above exception, another exception occurred:

ValueError                                Traceback (most recent call last)
Cell In [54], line 1
----> 1 X[:, 0] = le_country.transform(X[:,0])
      2 X[:, 1] = le_education.transform(X[:,1])
      3 X = X.astype(float)

File ~\AppData\Local\Programs\Python\Python310\lib\site-packages\sklearn\preprocessing\_label.py:138, in LabelEncoder.transform(self, y)
    135 if _num_samples(y) == 0:
    136     return np.array([])
--> 138 return _encode(y, uniques=self.classes_)

File ~\AppData\Local\Programs\Python\Python310\lib\site-packages\sklearn\utils\_encode.py:226, in _encode(values, uniques, check_unknown)
    224         return _map_to_integer(values, uniques)
    225     except KeyError as e:
--> 226         raise ValueError(f"y contains previously unseen labels: {str(e)}")
    227 else:
    228     if check_unknown:

ValueError: y contains previously unseen labels: 'United States'

André Guerra · Accepted Answer · 2022-11-26 20:23:13Z

0

If you are fitting an encoder then you should use:

from sklearn import preprocessing
le = preprocessing.LabelEncoder()
le.fit([1, 2, 2, 6])

You are probably using the encoder without having it been fit or the new data which you are using to train a model does not have the labels ('United States') which you fitted the encoder with.

answered Nov 26, 2022 at 20:23

André Guerra

5069 silver badges23 bronze badges

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

Comments

user24332144 · Accepted Answer · 2024-04-14 21:25:52Z

0

Run all cells once again. this happens when you are working on big project you make sure next day you run all cells and see if it works

answered Apr 14, 2024 at 21:25

user24332144

1

Collectives™ on Stack Overflow

Getting a ValueError after running the LabelEncoder command

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related