如何将多个roc绘制在一起？

import matplotlib.pyplot as plt
import numpy as np

plt.figure()

def plot_roc(fpr, tpr, label):
    plt.plot(fpr, tpr, label=label)
    plt.xlabel('False Positive Rate')
    plt.ylabel('True Positive Rate')
    plt.title('Receiver Operating Characteristic (ROC) Curve')
    plt.legend()

fpr1 = [0, 0.1, 0.2, 0.3, 0.4, 0.5]
tpr1 = [0, 0.2, 0.4, 0.6, 0.8, 1]
label1 = 'Model 1'

fpr2 = [0, 0.2, 0.4, 0.6, 0.8, 1]
tpr2 = [0, 0.3, 0.5, 0.7, 0.9, 1]
label2 = 'Model 2'

plot_roc(fpr1, tpr1, label1)
plot_roc(fpr2, tpr2, label2)

plt.show()