如何正确地遍历matplotlib图的子图以显示每条线的最终y轴值？

import matplotlib.pyplot as plt
import numpy as np

fig, ax = plt.subplots()
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)
ax.plot(x, y1, label='sin(x)')
ax.plot(x, y2, label='cos(x)')

lines = ax.get_lines()
y_values = []
for line in lines:
    y_values.append(line.get_ydata()[-1])

for i, y in enumerate(y_values):
    ax.text(10.5, y, f'y{i+1}={y:.2f}')

import matplotlib.pyplot as plt
import numpy as np

fig, ax = plt.subplots()
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)
ax.plot(x, y1, label='sin(x)')
ax.plot(x, y2, label='cos(x)')

lines = ax.get_lines()
y_values = []
for line in lines:
    y_values.append(line.get_ydata()[-1])

for i, y in enumerate(y_values):
    ax.text(10.5, y, f'y{i+1}={y:.2f}')

plt.show()