Suppose I want to save a Bokeh model as json for later use. Following the fact that “the smallest unit of serialization is the document” I do the following:
s = curdoc().to_json_string()
with open("file.json","w") as f:
f.write(s)
To recover the model, I can do:
with open('document.json') as f:
d = f.read()
D = Document().from_json_string(d)
f = D.roots[0]
D.clear()
curdoc().add_root(f)
The D.clear() is needed because otherwise you get the error that a model is associated to more than one document.
Is there a more elegant way to do this? The question has been raised before, for example in this stackoverflow post where the answer proposes iterating over all submodels of D.roots[0] and changing the _document property, but clear() seems to work for me.