我正在尝试将 SVG 图像添加到 manim 的场景中。这是我的 SVG 文件（名为“AND_DIN”）：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
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width="100"
height="80"
id="svg2"
sodipodi:version="0.32"
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version="1.0"
sodipodi:docname="AND DIN.svg"
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<metadata
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<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
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inkscape:label="Layer 1"
inkscape:groupmode="layer"
id="layer1">
<path
style="fill:none;stroke:#000000;stroke-width:1.99999976;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="M 70.166665,40 L 95.166663,40"
id="path3059"
sodipodi:nodetypes="cc" />
<path
style="fill:none;stroke:#000000;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
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sodipodi:nodetypes="cc" />
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style="fill:none;stroke:#000000;stroke-width:2;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="M 35,58 L 5,58"
id="path3944"
sodipodi:nodetypes="cc" />
<path
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:none;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;marker:none;stroke-miterlimit:4;stroke-dashoffset:0;stroke-opacity:1;visibility:visible;display:inline;overflow:visible;enable-background:accumulate"
d="M 34,3.5 L 34,5 L 34,75 L 34,76.5 L 35.5,76.5 C 55.631594,76.5 72,60.131594 72,40 C 72,19.868406 55.631594,3.5 35.5,3.5 L 34,3.5 z M 37,6.65625 C 54.795557,7.4575527 68.5,22.005837 68.5,40 C 68.5,57.994163 54.795557,72.542447 37,73.34375 L 37,6.65625 z"
id="path4775"
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</svg>
这是我的场景文件（名为 gates.py）：
from manimlib.imports import *
class AndGate(SVGMobject):
CONFIG = {
"file_name" : "AND_DIN",
"stroke_width" : 2,
"fill_opacity" : 0,
"height" : 0.5,
}
class Shapes(Scene):
def construct(self):
gate = AndGate()
self.add(gate)
它给出了以下错误：
Traceback (most recent call last):
File "/home/manul/animations/manim/manimlib/extract_scene.py", line 155, in main
scene = SceneClass(**scene_kwargs)
File "/home/manul/animations/manim/manimlib/scene/scene.py", line 53, in __init__
self.construct()
File "./mytry/gates.py", line 13, in construct
gate = AndGate()
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 46, in __init__
VMobject.__init__(self, **kwargs)
File "/home/manul/animations/manim/manimlib/mobject/mobject.py", line 48, in __init__
self.generate_points()
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 69, in generate_points
mobjects = self.get_mobjects_from(svg)
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 87, in get_mobjects_from
for child in element.childNodes
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 87, in <listcomp>
for child in element.childNodes
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 81, in get_mobjects_from
self.update_ref_to_element(element)
File "/home/manul/animations/manim/manimlib/mobject/svg/svg_mobject.py", line 307, in update_ref_to_element
new_refs = dict([(e.getAttribute('id'), e) for e in self.get_all_childNodes_have_id(defs)])
TypeError: 'Element' object is not iterable
并非所有图像都给出此错误。例如，这个 SVG 工作：
<?xml version="1.0"?><svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">
<title>AND gate</title>
<metadata id="metadata7">image/svg+xml</metadata>
<g>
<path fill="none" stroke="#000000" stroke-linecap="square" stroke-miterlimit="4" stroke-dashoffset="0" d="m19.370987,20.318518c-4.836363,0 -12.805312,0.000008 -12.805312,0.000008l0,-19.817436l12.805312,-0.001089c4.836365,0 8.76153,4.439348 8.76153,9.90926c0,5.469912 -3.925165,9.909258 -8.76153,9.909258zm8.76153,-9.909258l6.103685,0m-33.736202,-4.954623l6.065714,0m-6.065714,9.909251l6.065714,0" id="path6087"/>
<path
style="fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:black;stroke-width:3.125;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
d="M 89.111392,80.140217 L 89.111392,276.68403 L 266.56332,276.68403"
id="path3110" />
<title>Layer 1</title>
</g>
</svg>
我在网上查了好几次，但我无法弄清楚。任何帮助将不胜感激。