Removing Blank and Hidden Layers from an SVG

We discovered our former graphics designer was including all the hidden layers in his SVG icons. Each icon, that is, had a copy of every other icon stored inside invisibly. The practical upshot is our dashboard icons were in excess of 4MB to load. I wrote a simple script to iterate through and strip invisible layers. For anyone that might find utility:

def remove_blank_layers(image_name):
  tree = ET.ElementTree();
  root = tree.getroot();
  children_to_remove = list();
  for child in root.getchildren():
  if child.attrib.get('display') == 'none':
  for child in children_to_remove:

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