Django Html and plots to PDF - django

Question

I am using the Django application to generate some graphs using Plotly so
I tried to generate a pdf file of the following plots of
my HTML page is:
<center> <p class="lead"><strong><em> All Plots </em></strong></p></center>
<div class="row">
<div class="col-md-6" >
{{ sunburst|safe}}
</div>
<div class="col-md-6" >
{{ sunburst2|safe}}
</div>
</div>
and my url.py :
path('export_pdf/', views.export_pdf, name='export_pdf'),
and the views.py;
def export_pdf(request):
df = px.data.gapminder().query("country=='Canada'")
fig = px.line(df, x="year", y="lifeExp", title='Life expectancy in Canada')
df2 = px.data.gapminder().query("continent=='Oceania'")
fig2 = px.line(df2, x="year", y="lifeExp", color='country')
chart = fig.to_html()
chart2 = fig2.to_html()
context= {
'sunburst':chart,
'sunburst2':chart2,
}
return render(request, 'Home/Reporting/part_pdf.html',context)
I tried some code from this page but I can't generate the file any help?
https://plotly.com/python/v3/pdf-reports/
are there any other methods for doing that (html page with plots and tables)?
All my best

Answer 1

I searched high and low and could not find anything. Hacked together a solution that worked very well for me:
import plotly.graph_objs as go
import plotly.io as pio
labels = ['Alice','Bob','Carl']
vals = [2,5,4]
data = [go.Bar(x=vals, y=labels, orientation='h')]
layout = go.Layout(margin_pad=10)
fig = go.Figure(data=data,layout=layout)
svg = pio.to_image(fig, format="svg")
context["svg"] = svg.decode("utf-8")
and then in the template something like this
<div>
{{ svg|safe }}
</div>
The first solution was the one you referenced as well. The quality was very bad though. This solution is a lot more crisp.
I used it with weasyprint, but I'm sure it will work with other solutions as well.