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Backport 7659, BUG: Temporary fix for str(mvoid) for object field types #7660

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Merged
merged 1 commit into from
May 23, 2016
Merged

Backport 7659, BUG: Temporary fix for str(mvoid) for object field types #7660

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9 changes: 8 additions & 1 deletion numpy/ma/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5954,7 +5954,14 @@ def __str__(self):
return self._data.__str__()
printopt = masked_print_option
rdtype = _recursive_make_descr(self._data.dtype, "O")
res = np.array([self._data]).astype(rdtype)

# temporary hack to fix gh-7493. A more permanent fix
# is proposed in gh-6053, after which the next two
# lines should be changed to
# res = np.array([self._data], dtype=rdtype)
res = np.empty(1, rdtype)
res[:1] = self._data

_recursive_printoption(res, self._mask, printopt)
return str(res[0])

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4 changes: 4 additions & 0 deletions numpy/ma/tests/test_core.py
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Expand Up @@ -757,6 +757,10 @@ def test_mvoid_print(self):
finally:
masked_print_option.set_display(ini_display)

# also check if there are object datatypes (see gh-7493)
mx = array([(1,), (2,)], dtype=[('a', 'O')])
assert_equal(str(mx[0]), "(1,)")

def test_mvoid_multidim_print(self):

# regression test for gh-6019
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