feat: Add option to render a subgraph of a hugr. #2497
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## main #2497 +/- ##
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Coverage 82.66% 82.67%
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Files 251 251
Lines 46644 46661 +17
Branches 42190 42190
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+ Hits 38559 38576 +17
Misses 6034 6034
Partials 2051 2051
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mark-koch
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mark-koch
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Thanks, that's a very useful feature 👍
I'm not a big fan of the default dot rendering for external nodes:
Could you add those nodes manually and use self._format_html_label to get a matching style?
Also, would be good to add a snapshot test (e.g. see test_html_labels in hugr-py/tests/test_hugr_build.py)
hugr-py/src/hugr/hugr/render.py
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| self._viz_node(child, hugr, sub) | ||
| html_label = self._format_html_label(**label_config) | ||
| sub.node(f"{node.idx}", shape="plain", label=f"<{html_label}>") | ||
| self.nodes.add(node) |
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Maybe hoist this out of the if statement since you're doing the same in both branches?
Done: now looks like this (and we also avoid warnings from graphviz which is nice):
Done. |
🤖 I have created a release *beep* *boop* --- ## [0.13.1](hugr-py-v0.13.0...hugr-py-v0.13.1) (2025-08-18) ### Features * Add option to render a subgraph of a hugr. ([#2497](#2497)) ([c3370fe](c3370fe)) * **py:** implement `Sequence` protocol for qsys results/shots ([#2524](#2524)) ([b42e9df](b42e9df)) * Type of constants in `core` `Term`s. ([#2411](#2411)) ([2ba5764](2ba5764)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
For moderately sized hugrs, rendering the whole hugr produces sprawling images that are difficult to analyse. This feature allows one to select a region to render.
Example output:
h_10.pdf