“管道”对象没有属性“_check_fit_params”

Question

from imblearn.over_sampling import SMOTE
from imblearn.under_sampling import RandomUnderSampler
from imblearn.pipeline import Pipeline

# Define features and target
X = df.drop('infected', axis=1)
y = df['infected']

# Split the data into training and testing sets
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

# Define the resampling strategy
over = SMOTE(sampling_strategy=0.5)  # Oversample the minority class to 50% of the majority class
under = RandomUnderSampler(sampling_strategy=0.8)  # Undersample the majority class to 80% of its original size

pipeline = Pipeline(steps=[('o', over), ('u', under)])

# Apply the resampling
X_resampled, y_resampled = pipeline.fit_resample(X_train, y_train)

# Show the new class distribution
print("Resampled class distribution:", pd.Series(y_resampled).value_counts())

这是我的代码

这是我遇到的错误

AttributeError                            Traceback (most recent call last)
Cell In[7], line 19
     16 pipeline = Pipeline(steps=[('o', over), ('u', under)])
     18 # Apply the resampling
---> 19 X_resampled, y_resampled = pipeline.fit_resample(X_train, y_train)
     21 # Show the new class distribution
     22 print("Resampled class distribution:", pd.Series(y_resampled).value_counts())

File ~\anaconda3\Lib\site-packages\imblearn\pipeline.py:372, in Pipeline.fit_resample(self, X, y, **fit_params)
    342 """Fit the model and sample with the final estimator.
    343 
    344 Fits all the transformers/samplers one after the other and
   (...)
    369     Transformed target.
    370 """
    371 self._validate_params()
--> 372 fit_params_steps = self._check_fit_params(**fit_params)
    373 Xt, yt = self._fit(X, y, **fit_params_steps)
    374 last_step = self._final_estimator

AttributeError: 'Pipeline' object has no attribute '_check_fit_params'

我已经尝试了一切。我的所有包都已更新。我尝试使用的所有方法都在 sklearn 和 imblearn 这两个网站上查看。

Answer 1

我有同样的问题，但是将不平衡学习器的软件包版本升级到0.12.4后，我发现它工作得很好。我原来的版本是0.11.1。你可以尝试一下。