Plotly Express 条形图失败，日期时间作为 x 轴输入

Question

我正在拼命寻找一种解决方案来创建条形图，并以绘图表达和日期时间值作为 x 轴输入。图表已创建，但仍为空。在没有确定轴的情况下，我得到了一个正确的图表。有谁知道解决方案吗？

import plotly.express as px
print(type(df.index))

fig = px.bar(df, x=df.index, y=df['moneyness'])
fig.show()
    

我的数据框如下所示：

 {'trade_seq': {Timestamp('2022-01-01 00:16:21.725000+0000', tz='UTC'): 3,
  Timestamp('2022-01-01 00:19:23.104000+0000', tz='UTC'): 227,
  Timestamp('2022-01-01 00:23:27.841000+0000', tz='UTC'): 228,
  Timestamp('2022-01-01 00:28:56.438000+0000', tz='UTC'): 183,
  Timestamp('2022-01-01 00:43:06.220000+0000', tz='UTC'): 184},  
....
'moneyness': {Timestamp('2022-01-01 00:16:21.725000+0000', tz='UTC'): -4310.019999999997,
  Timestamp('2022-01-01 00:19:23.104000+0000', tz='UTC'): 761.9400000000023,
  Timestamp('2022-01-01 00:23:27.841000+0000', tz='UTC'): 631.0899999999965,
  Timestamp('2022-01-01 00:28:56.438000+0000', tz='UTC'): -355.2699999999968,
  Timestamp('2022-01-01 00:43:06.220000+0000', tz='UTC'): -646.7200000000012}}