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Backport PR #12572 on branch v3.0.x (Fix singleton hist labels) #12594

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Merged
merged 1 commit into from
Oct 24, 2018
Merged

Backport PR #12572 on branch v3.0.x (Fix singleton hist labels) #12594

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2 changes: 2 additions & 0 deletions lib/matplotlib/axes/_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6759,6 +6759,8 @@ def hist(self, x, bins=None, range=None, density=None, weights=None,
labels = [None]
elif isinstance(label, str):
labels = [label]
elif not np.iterable(label):
labels = [str(label)]
else:
labels = [str(lab) for lab in label]

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15 changes: 15 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3065,6 +3065,21 @@ def test_hist_emptydata():
ax.hist([[], range(10), range(10)], histtype="step")


def test_hist_labels():
# test singleton labels OK
fig, ax = plt.subplots()
l = ax.hist([0, 1], label=0)
assert l[2][0].get_label() == '0'
l = ax.hist([0, 1], label=[0])
assert l[2][0].get_label() == '0'
l = ax.hist([0, 1], label=None)
assert l[2][0].get_label() == '_nolegend_'
l = ax.hist([0, 1], label='0')
assert l[2][0].get_label() == '0'
l = ax.hist([0, 1], label='00')
assert l[2][0].get_label() == '00'


@image_comparison(baseline_images=['transparent_markers'], remove_text=True)
def test_transparent_markers():
np.random.seed(0)
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