如何在matplotlib中绘制时间戳(毫秒)

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from datetime import datetime

timestamps = [1546300800000, 1546387200000, 1546473600000, 1546560000000]

dates = [datetime.fromtimestamp(ts/1000) for ts in timestamps]

fig, ax = plt.subplots()

ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d %H:%M:%S'))

ax.plot(dates, range(len(dates)))

plt.xticks(rotation=45)

plt.show()