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, dest, *, highlight=None)
| 13 | |
| 14 | |
| 15 | def graphviz_dump_transform(transform, dest, *, highlight=None): |
| 16 | """ |
| 17 | Generate a graphical representation of the transform tree for *transform* |
| 18 | using the :program:`dot` program (which this function depends on). The |
| 19 | output format (png, dot, etc.) is determined from the suffix of *dest*. |
| 20 | |
| 21 | Parameters |
| 22 | ---------- |
| 23 | transform : `~matplotlib.transform.Transform` |
| 24 | The represented transform. |
| 25 | dest : str |
| 26 | Output filename. The extension must be one of the formats supported |
| 27 | by :program:`dot`, e.g. png, svg, dot, ... |
| 28 | (see https://www.graphviz.org/doc/info/output.html). |
| 29 | highlight : list of `~matplotlib.transform.Transform` or None |
| 30 | The transforms in the tree to be drawn in bold. |
| 31 | If *None*, *transform* is highlighted. |
| 32 | """ |
| 33 | |
| 34 | if highlight is None: |
| 35 | highlight = [transform] |
| 36 | seen = set() |
| 37 | |
| 38 | def recurse(root, buf): |
| 39 | if id(root) in seen: |
| 40 | return |
| 41 | seen.add(id(root)) |
| 42 | props = {} |
| 43 | label = type(root).__name__ |
| 44 | if root._invalid: |
| 45 | label = f'[{label}]' |
| 46 | if root in highlight: |
| 47 | props['style'] = 'bold' |
| 48 | props['shape'] = 'box' |
| 49 | props['label'] = '"%s"' % label |
| 50 | props = ' '.join(map('{0[0]}={0[1]}'.format, props.items())) |
| 51 | buf.write(f'{id(root)} [{props}];\n') |
| 52 | for key, val in vars(root).items(): |
| 53 | if isinstance(val, TransformNode) and id(root) in val._parents: |
| 54 | buf.write(f'"{id(root)}" -> "{id(val)}" ' |
| 55 | f'[label="{key}", fontsize=10];\n') |
| 56 | recurse(val, buf) |
| 57 | |
| 58 | buf = StringIO() |
| 59 | buf.write('digraph G {\n') |
| 60 | recurse(transform, buf) |
| 61 | buf.write('}\n') |
| 62 | subprocess.run( |
| 63 | ['dot', '-T', Path(dest).suffix[1:], '-o', dest], |
| 64 | input=buf.getvalue().encode('utf-8'), check=True) |