残差图诊断

def solve():
    import pandas as pd
    import matplotlib.pyplot as plt
    from sklearn.linear_model import LinearRegression
    url = '____'
    df = pd.read_csv(____)
    mod = LinearRegression().fit(____)
    resid = df['____'] - mod.predict(____)
    print(____)
    plt.scatter(mod.predict(____), resid, alpha=____, color='____')
    plt.axhline(____, color='____', ls='____'); plt.xlabel(____); plt.ylabel(____)
    plt.title(____); plt.tight_layout(); plt.show()