如何使用plotlys go.bar增加条形图的垂直尺寸/如何使用相同的比例？

import plotly.graph_objects as go

fig = go.Figure()

fig.add_trace(go.Bar(
    x=[1, 2, 3],
    y=[3, 2, 1],
    name='Trace 1'
))

fig.add_trace(go.Bar(
    x=[1, 2, 3],
    y=[1, 2, 3],
    name='Trace 2'
))

fig.update_layout(barmode='stack')

fig.show()

import plotly.graph_objects as go

fig = go.Figure()

fig.add_trace(go.Bar(
    x=[1, 2, 3],
    y=[3, 2, 1],
    name='Trace 1'
))

fig.add_trace(go.Bar(
    x=[1, 2, 3],
    y=[1, 2, 3],
    name='Trace 2'
))

fig.update_layout(bargap=0)

fig.show()