特征工程_代码示例部分 1.导入数据 # 导入第三方工具包 import pandas as pd import numpy as np from sklearn import preprocessing import matplotlib import matplotlib.pyplot as plt import seaborn as sns from operator import itemgetter # 用于获取对象的位置 # 导入数据 train_data = pd.read_csv(r'F:\Users\TreeFei\文档\PyC\ML_Used_car\data\used