根据条件更改matplotlib的ticklabel的颜色

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(0, 10, 0.1)
y = np.sin(x)
plt.plot(x, y)

def get_ticklabel_color(value):
    if value < 0:
        return 'red'
    elif value > 0:
        return 'green'
    else:
        return 'black'

ax = plt.gca()

for tick in ax.get_xticklabels():
    tick.set_color(get_ticklabel_color(float(tick.get_text())))

for tick in ax.get_yticklabels():
    tick.set_color(get_ticklabel_color(float(tick.get_text())))

plt.show()