# 预先导入库
from sklearn.linear_model import LinearRegression
from sklearn.preprocessing import PolynomialFeatures
import matplotlib.pyplot as plt
import numpy as np
from scipy import interpolate
# 预先导入库
from sklearn.linear_model import LinearReg# 预先导入库
from sklearn.linear_model import LinearRegression
from sklearn.preprocessing import PolynomialFeatures
import matplotlib.pyplot as plt
import numpy as np
from scipy import interpolate
# 预先导入库
from sklearn.linear_model import LinearReg