我想在scikit-learn中向变换器传递额外的数据:
from sklearn.base import BaseEstimator, TransformerMixin
from sklearn.ensemble import RandomForestClassifier
from sklearn.pipeline import Pipeline
import numpy as np
from sklearn.model_selection import GridSearchCV
class myTransformer(BaseEstimator, TransformerMixin):
def __init__(self, my_np_array):
self.data = my_np_array
print self.data
def transform(self, X):
return X
def fit(self, X, y=None):
return self
data = np.random.rand(20,20)
data2 = np.random.rand(6,6)
y = np.array([1, 2, 3, 1, 2, 3, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 3, 3, 3, 3])
pipe = Pipeline(steps=[('myt', myTransformer(data2)), ('randforest', RandomForestClassifier())])
params = {"randforest__n_estimators": [100, 1000]}
estimators = GridSearchCV(pipe, param_grid=params, verbose=True)
estimators.fit(data, y)
然而,在 scikit-learn 管道中使用时,似乎会消失。
在 init 方法中打印出来的是 None
,我该如何修复它?
.fit
,这样错误才会出现。 - lejlot