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fix edge coloring bug in plot_coupling_map (backport #12369) #12379

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May 10, 2024
Merged

fix edge coloring bug in plot_coupling_map (backport #12369) #12379

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2 changes: 2 additions & 0 deletions qiskit/visualization/gate_map.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1039,7 +1039,9 @@ def plot_coupling_map(
graph = CouplingMap(coupling_map).graph

if not plot_directed:
line_color_map = dict(zip(graph.edge_list(), line_color))
graph = graph.to_undirected(multigraph=False)
line_color = [line_color_map[edge] for edge in graph.edge_list()]

for node in graph.node_indices():
graph[node] = node
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5 changes: 5 additions & 0 deletions releasenotes/notes/plot-circuit-layout-5935646107893c12.yaml
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@@ -0,0 +1,5 @@
---
fixes:
- |
Fixed a bug in :func:`plot_coupling_map` that caused the edges of the coupling map to be colored incorrectly.
See https://github.com/Qiskit/qiskit/pull/12369 for details.