关于#python#的问题，如何解决？

Question

from sklearn.model_selection import GridSearchCV
from sklearn.linear_model import LogisticRegression
from sklearn.feature_selection import SelectFromModel
from sklearn.metrics import f1_score
from sklearn.model_selection import KFold
columns = data_df.columns[1:]
data_df = pd.get_dummies(data_df,columns=columns)
data_df.shape
(400000, 1077)
feature_names = data_df.columns[data_df.columns != 'isClick']
X_sample = data_df[feature_names].values
y_sample = data_df['isClick'].values
X_train, X_test, y_train, y_test = train_test_split(X_sample,y_sample,
                                                    test_size=0.25,random_state=2019,
                                                    stratify=y_sample)
print (X_train.shape, X_test.shape, y_train.shape, y_test.shape)


KeyError                                  Traceback (most recent call last)
D:\CAS\Anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
   2656             try:
-> 2657                 return self._engine.get_loc(key)
   2658             except KeyError:

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

KeyError: 'isClick'

During handling of the above exception, another exception occurred:

KeyError                                  Traceback (most recent call last)
<ipython-input-60-ecfec88f8b60> in <module>
     15 #构造样本数据
     16 X_sample = data_df[feature_names].values
---> 17 y_sample = data_df['isClick'].values
     18 #将样本数据分为训练及测试数据集，将stratify参数设置为y_sample，按照y_sample中的0、1比例分配
     19 X_train, X_test, y_train, y_test = train_test_split(X_sample,y_sample,

D:\CAS\Anaconda3\lib\site-packages\pandas\core\frame.py in __getitem__(self, key)
   2925             if self.columns.nlevels > 1:
   2926                 return self._getitem_multilevel(key)
-> 2927             indexer = self.columns.get_loc(key)
   2928             if is_integer(indexer):
   2929                 indexer = [indexer]

D:\CAS\Anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
   2657                 return self._engine.get_loc(key)
   2658             except KeyError:
-> 2659                 return self._engine.get_loc(self._maybe_cast_indexer(key))
   2660         indexer = self.get_indexer([key], method=method, tolerance=tolerance)
   2661         if indexer.ndim > 1 or indexer.size > 1:

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

KeyError: 'isClick'

Answer 1

这个错误是说数据表中没有'isClick'列名
检测下数据表文件,是不是'isClick'列名写错了

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