Title in figure crashes visdom rendering

Bug Description When using plotlyplot function to push a plotly figure (Because I needed subplots), the rendering crash if I set a title in the figure (by using fig[‘layout’].update function).

Reproduction Steps

1. Create a subplot using plotly (fig = tools.make_subplots(...))
2. Fill the fig with traces by using fig.append_trace function
3. Update the fig layout by using fig['layout'].update(title='whatever')
4. Upload the figure on visdom server vis.plotlyplot(fig)
5. The visdom web rendering crashed (blue screen) after the upload

Expected behavior The plot should be visible in visdom web interface.

Client logs: In the console of the browser, I got the javascript error n.title.match is not a function that make the page go plain blue.

[JackUrb]

Hi all - sorry I’ve been pretty swamped with another project and unable to investigate a fix for this just yet. My first look surfaced this line as the likely source of the problem: https://github.com/facebookresearch/visdom/blob/b71063fdac0f70415abe3fefefe86c7d529d1495/js/main.js#L596 Logging what is in the title attribute at/before that moment should surface what is causing the break, but I haven’t gotten to try it yet.

Some more context from my first pass: https://github.com/facebookresearch/visdom/blob/b71063fdac0f70415abe3fefefe86c7d529d1495/py/visdom/server.py#L438 This would seem to suggest that title is ultimately stored in opts rather than layout. As plotlyplot doesn’t allow populating the options manually, they are handled here: https://github.com/facebookresearch/visdom/blob/b71063fdac0f70415abe3fefefe86c7d529d1495/py/visdom/__init__.py#L872 For some reason I suppose the title isn’t a regular string.

[pringshia]

@JackUrb I can take a look at this