如何使用matplotlib将txt文件中的det unix时间值转换为日期值？

import matplotlib.pyplot as plt
import datetime

with open('data.txt', 'r') as file:
    lines = file.readlines()

timestamps = []
for line in lines:
    timestamp = int(line.strip())
    timestamps.append(timestamp)

dates = [datetime.datetime.fromtimestamp(timestamp) for timestamp in timestamps]

plt.plot(dates, timestamps)
plt.xlabel('Date')
plt.ylabel('Unix Time')
plt.title('Unix Time vs Date')
plt.show()