Original axes range

Hi! I understand that I can zoom in on / zoom out of a plot like this:

import numpy as np
import plotly.graph_objects as go

x = np.linspace(0, 10, 11)
y = x ** 2

fig = go.Figure(go.Scatter(x=x, y=y))

fig.update_xaxes({'range': (5, 10)})

Now, I can access the range:

assert list(fig.select_xaxes())[0].range == (5, 10)

I can also reset it:

fig.update_xaxes({'range': None})

But how can I find the range of the original plot?