[Python] Can you help me in this error? AttributeError: 'numpy.ndarray' object has no...

in all_features = X_train.keys()

AttributeError: 'numpy.ndarray' object has no attribute 'keys'
​

This my code:

cor_list = []

#calculate the correlation with y for each feature
for i in all_features:
cor = np.corrcoef(X_train, y_train, rowvar=False)[0, 1]
cor_list.append(cor)
#replace NaN with 0
cor_list = [0 if np.isnan(i) else i for i in cor_list]
#feature_name
cor_feature = X_train.iloc[:np.argsort(np.abs(cor_list))[-num_feats:]].columns.tolist()
#feature selection? 0 for not select, 1 for select
cor_support = [True if i in cor_feature else False for i in all_features]
X_train_selected = pd.DataFrame(X_train, columns=cor_feature)
X_test_selected = pd.DataFrame(X_test, column = cor_feature)
# Correlation with output variable
return X_train_selected, X_test_selected


**This when i called in main:**

``` all_features = X_train.keys()

X_train_selected, X_test_selected = FS.Feature_cor_selector(X_train, X_test, y_train, 10, all_features) ```

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