[Answered ]-Using RenderContext in render_to_string in Django 1.10

RenderContext‘s base class, BaseContext, has a function called flatten which will take the array of dictionaries inside a Context object and return a single dictionary

render_to_string(svg_template_file_name, context, request=context.request)

would need changing to

render_to_string(svg_template_file_name, context.flatten(), request=context.request)