How do I center the outputs on a Python Jupyter notebook?

I have a report that I have created in a Jupyter Notebook. I want the outputs (plots) to be centered for aesthetic reasons.

I have tried the answer given here:

Centering output on IPython notebook

However this one does not work.

I did find this which works on Stackoverflow (Center align outputs in ipython notebook)

CSS = """
.output {
    align-items: center;
}
"""

HTML('<style>{}</style>'.format(CSS))

However, whilst it centers the plots, when the plot is wide and doesn't need to be centered, it extends it and makes it wider than the page which I dont want. I have tried adjusting the output margin area like it said, but it either pushes it to the left again or squishes it to the point that it needs scroll bars (again I dont want that)

Anyone got any suggestions? I thought this would be standard and easy but apparently not (A way to center only a code block would be a perfect workaround if what I want is not possible?)

I.e. center this table:

Which is produced by this code:

df = pd.DataFrame(a01) 

new_df01 = df[['Call','FirstReceivedDate','Value']]
new_df01['month'] = pd.Categorical(new_df01['FirstReceivedDate'].dt.strftime('%b'), 
                                         categories=vals, ordered=True) 

groupA01 = new_df01.groupby(['Call']).agg({'Value':sum, 'FirstReceivedDate':'count'}).rename(columns={'FirstReceivedDate':'Count'})
groupA01['Value'] = groupA01['Value'].map('{:,.2f}'.format)

def hover(hover_color="#F1C40F"):
    return dict(selector="tr:hover",
                props=[("background-color", "%s" % hover_color)])

styles2 = [
    hover(),
    dict(selector="th", props=[("font-size", "80%"),
                               ("font-family", "Gill Sans MT"),
                               ("color",'white'),
                               ('background-color', 'rgb(11, 48, 79)'),
                               ("text-align", "center")]),
    dict(selector="td", props=[("font-size", "75%"),
                               ("font-family", "Gill Sans MT"),
                               ("text-align", "center")]),
    dict(selector="tr", props=[("line-height", "11px")]),
    dict(selector="caption", props=[("caption-side", "bottom")])
]


html2 = (groupA01.style.set_table_styles(styles2)
          .set_caption(""))
html2

Thank you!

Adding code to show plotting of Heatmap:

dfreverse = df_hml.values.tolist()
dfreverse.reverse()

colorscale = [[0,'#FFFFFF'],[0.5, '#454D59'], [1, '#F1C40F']]

x = [threeYr,twoYr,oneYr,Yr]
y = ['March', 'February', 'January', 'December', 'November', 'October', 'September', 'August', 'July', 'June', 'May', 'April']
z = dfreverse

hovertext = list()
for yi, yy in enumerate(y):
    hovertext.append(list())
    for xi, xx in enumerate(x):
        hovertext[-1].append('Count: {}<br />{}<br />{}'.format(z[yi][xi],yy, xx))

data = [plotly.graph_objs.Heatmap(z=z,
                                  colorscale=colorscale,
                                  x=x,
                                  y=y,
                                  hoverinfo='text',
                                  text=hovertext)]

layout = go.Layout(
    autosize=False,
    font=Font(
        family="Gill Sans MT",
        size = 11
    ),
    width=600,
    height=450,
    margin=go.Margin(
        l=0,
        r=160,
        b=50,
        t=100,
        pad=3
    ),
        xaxis=dict(
        title='',
        showgrid=False,
        titlefont=dict(
           # family='Gill sans, monospace',
            size=12,
            #color='#7f7f7f'
        ),
        showticklabels=True,
        tickangle=25,
        tickfont=dict(
            family="Gill Sans MT",
            size=12,
            color='black'
        ),
    ),
    yaxis=dict(
        title='',
        showgrid=False,
        titlefont=dict(
            #family='Gill sans',
            #size=12,
            #color='#7f7f7f'
        ),
        showticklabels=True,
        tickangle=25,
        tickfont=dict(
            family="Gill Sans MT",
            size=12,
            color='black'
        ),
)
)

fig = plotly.graph_objs.Figure(data=data, layout=layout)
plotly.offline.iplot(fig,config={"displayModeBar": False},show_link=False,filename='pandas-heatmap')