65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
|
"""
|
||
|
|
Internal debugging utilities, that are not expected to be used in the rest of
|
||
|
|
the codebase.
|
||
|
|
|
||
|
|
WARNING: Code in this module may change without prior notice!
|
||
|
|
"""
|
||
|
|
|
||
|
|
from io import StringIO
|
||
|
|
from pathlib import Path
|
||
|
|
import subprocess
|
||
|
|
|
||
|
|
from matplotlib.transforms import TransformNode
|
||
|
|
|
||
|
|
|
||
|
|
def graphviz_dump_transform(transform, dest, *, highlight=None):
|
||
|
|
"""
|
||
|
|
Generate a graphical representation of the transform tree for *transform*
|
||
|
|
using the :program:`dot` program (which this function depends on). The
|
||
|
|
output format (png, dot, etc.) is determined from the suffix of *dest*.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
transform : `~matplotlib.transform.Transform`
|
||
|
|
The represented transform.
|
||
|
|
dest : str
|
||
|
|
Output filename. The extension must be one of the formats supported
|
||
|
|
by :program:`dot`, e.g. png, svg, dot, ...
|
||
|
|
(see https://www.graphviz.org/doc/info/output.html).
|
||
|
|
highlight : list of `~matplotlib.transform.Transform` or None
|
||
|
|
The transforms in the tree to be drawn in bold.
|
||
|
|
If *None*, *transform* is highlighted.
|
||
|
|
"""
|
||
|
|
|
||
|
|
if highlight is None:
|
||
|
|
highlight = [transform]
|
||
|
|
seen = set()
|
||
|
|
|
||
|
|
def recurse(root, buf):
|
||
|
|
if id(root) in seen:
|
||
|
|
return
|
||
|
|
seen.add(id(root))
|
||
|
|
props = {}
|
||
|
|
label = type(root).__name__
|
||
|
|
if root._invalid:
|
||
|
|
label = f'[{label}]'
|
||
|
|
if root in highlight:
|
||
|
|
props['style'] = 'bold'
|
||
|
|
props['shape'] = 'box'
|
||
|
|
props['label'] = '"%s"' % label
|
||
|
|
props = ' '.join(map('{0[0]}={0[1]}'.format, props.items()))
|
||
|
|
buf.write(f'{id(root)} [{props}];\n')
|
||
|
|
for key, val in vars(root).items():
|
||
|
|
if isinstance(val, TransformNode) and id(root) in val._parents:
|
||
|
|
buf.write(f'"{id(root)}" -> "{id(val)}" '
|
||
|
|
f'[label="{key}", fontsize=10];\n')
|
||
|
|
recurse(val, buf)
|
||
|
|
|
||
|
|
buf = StringIO()
|
||
|
|
buf.write('digraph G {\n')
|
||
|
|
recurse(transform, buf)
|
||
|
|
buf.write('}\n')
|
||
|
|
subprocess.run(
|
||
|
|
['dot', '-T', Path(dest).suffix[1:], '-o', dest],
|
||
|
|
input=buf.getvalue().encode('utf-8'), check=True)
|