Plotly Express template margin issue

Hello,

If I use px for a scatter plot with margin right and bottom set to 0, I get some strange margin on the right anyway

fig = px.scatter(data, x='x', y='y')
fig.update(layout = go.Layout(margin=dict(t=0,r=0,b=40,l=40)))

The same works fine using

fig = go.Figure()

If I try to set a default layout

import plotly.io as pio          # to set mine plot layout
pio.templates['mine'] = pio.to_templated(go.Figure().update_layout(plot_bgcolor='rgba(200,200,200,1)',legend=dict(orientation="h",y=1.1, x=.5, xanchor='center'),margin=dict(t=0,r=0,b=40,l=40))).layout.template
pio.templates.default = 'mine'

It works fine for

fig = go.Figure()

but for

fig = px.scatter(data, x='x', y='y')
fig.show()

I get large padding on top, and the same weird little bit on the right.

I refer to the margin on the right as weird because when I do

fig.layout

I only se

'margin': {'t': 60},

Even if I do

fig.update(layout = go.Layout(margin=dict(t=0,r=0,b=40,l=40)))

afterwards, I still have the weird right margin. No the same issue with go.Figure()

[fullpwemium]

@nicolaskruchten thanks for the hint - it is indeed xaxis.domain. Unfortunately setting this to [0,1] in my template is ignored by plotly.express, I have to use fig.update_layout(xaxis=dict(domain=[0,1])) after every figure…

I will try put a MWE for the title issue soon

[nicolaskruchten]

Yes, the domains are set explicitly from within PX, so it will never respect the template settings.

That said, @jonmmease what’s the reasoning for having the single-subplot case have a domain that’s not [0,1] ? Is this something I had in the pre-make_subplots version that got carried over or is it something that make_subplots does or…?