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ARROW-80: Handle len call for pre-init arrays #45

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ARROW-80: Handle len call for pre-init arrays #45

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6208d7d
ARROW-80: Handle len call for pre-init arrays
xhochy Mar 27, 2016
d9a1160
Add unit test for repr on pre-init Array
xhochy Mar 28, 2016
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5 changes: 4 additions & 1 deletion python/pyarrow/array.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,10 @@ cdef class Array:
return '{0}\n{1}'.format(type_format, values)

def __len__(self):
return self.sp_array.get().length()
if self.sp_array.get():
return self.sp_array.get().length()
else:
return 0

def isnull(self):
raise NotImplemented
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4 changes: 4 additions & 0 deletions python/pyarrow/tests/test_array.py
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Expand Up @@ -22,6 +22,10 @@

class TestArrayAPI(unittest.TestCase):

def test_repr_on_pre_init_array(self):
arr = pyarrow.array.Array()
assert len(repr(arr)) > 0

def test_getitem_NA(self):
arr = pyarrow.from_pylist([1, None, 2])
assert arr[1] is pyarrow.NA
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