Scikit-learn特征工程from sklearn.preprocessing import MinMaxScaler# 归一化APIfrom sklearn.preprocessing import StandardScalerimport pandas as pdfrom sklearn.feature_extraction import DictVectorizer# onehot编码

实验前准备：恢复上次实验数据在本次实验中，理论上，需要恢复上次1.2数据更新实验修改的数据，恢复成课程资料实例2里的样子。恢复方法不唯一删除更改过的两个表DELETE FROM employee;DELETE FROM salary;重新导入数据LOAD DATA INFILE 'C:/dataset2/employee.csv' INTO TABLE employeeCHARACTER SET