8000 BUG: Fix `MaskedArray.__setitem__` by eric-wieser · Pull Request #8594 · numpy/numpy · GitHub
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BUG: Fix MaskedArray.__setitem__ #8594

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Merged
merged 1 commit into from
Feb 20, 2017
Merged

BUG: Fix MaskedArray.__setitem__ #8594

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2 changes: 1 addition & 1 deletion numpy/ma/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3264,7 +3264,7 @@ def __setitem__(self, indx, value):
return

# Get the _data part of the new value
dval = value
dval = getattr(value, '_data', value)
# Get the _mask part of the new value
mval = getattr(value, '_mask', nomask)
if nbfields and mval is nomask:
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7 changes: 7 additions & 0 deletions numpy/ma/tests/test_core.py
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Expand Up @@ -4256,6 +4256,13 @@ def test_setitem(self):
a[0]['a'] = 2
assert_equal(a.mask, control)

def test_setitem_scalar(self):
# 8510
mask_0d = np.ma.masked_array(1, mask=True)
arr = np.ma.arange(3)
arr[0] = mask_0d
assert_array_equal(arr.mask, [True, False, False])

def test_element_len(self):
# check that len() works for mvoid (Github issue #576)
for rec in self.data['base']:
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