绘制相关矩阵热图

def solve():
    import matplotlib
    matplotlib.use(____)
    import matplotlib.pyplot as plt
    import numpy as np
    from sklearn.datasets import load_iris
    iris = load_iris()
    X = iris.data
    corr_matrix = np.corrcoef(____)
    plt.figure(figsize=(____, ____))
    plt.imshow(____)
    plt.colorbar()
    plt.title(____)
    plt.tight_layout()
    plt.show()
    print(____)