FIX: use requested style for empty bar charts. by vossvayne · Pull Request #31973 · matplotlib/matplotlib · GitHub
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FIX: use requested style for empty bar charts.#31973

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vossvayne wants to merge 1 commit into
matplotlib:mainfrom
vossvayne:issue-21506
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FIX: use requested style for empty bar charts.#31973
vossvayne wants to merge 1 commit into
matplotlib:mainfrom
vossvayne:issue-21506

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@vossvayne

@vossvayne vossvayne commented Jun 30, 2026

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PR summary

Issue: Bar has no child patches when input data is empty, this leads to the legend handle being left at default as there are no children.

Fix: Store the style information as a fallback and use it when there are no children. This closes #21506.

Example:

import matplotlib.pyplot as plt

ax = plt.figure().add_subplot()
ax.bar([], [], color="red", alpha=0.3, label="empty")
handler = ax.legend().legend_handles[0]
print(handler.get_facecolor()) # (1.0, 0.0, 0.0, 0.3)
print(handler.get_alpha()) # 0.3

AI Disclosure

Fixed manually.

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github-actions Bot commented Jun 30, 2026

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@rcomer rcomer mentioned this pull request Jun 30, 2026
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[Bug]: plt.bar legend displays incorrect style for empty data

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