多项式特征可视化

def solve():
    import pandas as pd
    import matplotlib.pyplot as plt
    import numpy as np
    from sklearn.preprocessing import PolynomialFeatures
    df = pd.read_csv(____)
    X = df[["____"]]; y = df["____"]
    pf = PolynomialFeatures(____)
    X_poly = pf.fit_transform(____)
    print(____)