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How to fix svg figures generated by matplotlib (which are slow in Inkscape)

In recent versions of matplotlib, if you save a figure in .svg format, you will find that the figures are really slow when you open them in Inkscape (and perhaps other graphics programs as well). This is a known issue that has been reported here.

Essentially, the problem is the stroke-miterlimit that matplotlib specifies in the .svg file. Below is a Python script that opens all .svg files in the current working directory, and removes the problematic setting (stroke-miterlimit:100000).

Warning: This scripts modifies the original files without making a backup.

#!/usr/bin/env python3
# coding=utf-8
import os
for basename in os.listdir('.'):
    if not basename.endswith('.svg'):
    with open(basename) as fd:
        s =
    with open(basename, 'w') as fd:
        fd.write(s.replace('stroke-miterlimit:100000;', ''))

There's much bigger issues in the world, I know. But I first have to take care of the world I know.

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