Encode SVG image data as UTF-8 before calling lxml cleaner (fixes #1836) #1837
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SVG image data generated by matplotlib contains an encoding header
"<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n"
The
clean_html
function from lxml refuses to parse this (see #1836)ValueError: Unicode strings with encoding declaration are not supported. Please use bytes input or XML fragments without declaration.
To avoid the problem, encode the string to bytes before calling
clean_html
.