Commits
Wes McKinney authored ae95dbd1894
ARROW-44: Python: prototype object model for array slot values ("scalars")
Non-exhaustive, but this will facilitate inspecting Arrow data while the library is in development.
```python
In [2]: arr = arrow.from_pylist([['foo', None], None, [], ['qux']])
In [3]: arr
Out[3]: <arrow.array.ListArray at 0x7f1970030f98>
In [4]: arr[0]
Out[4]: ['foo', None]
In [5]: type(arr[0])
Out[5]: arrow.scalar.ListValue
In [6]: arr[0][0]
Out[6]: 'foo'
In [7]: arr[0][1]
Out[7]: NA
In [8]: arr[1]
Out[8]: NA
In [9]: arr[2]
Out[9]: []
In [10]: len(arr[2])
Out[10]: 0
In [11]: arr.type
Out[11]: DataType(list<string>)
```
Author: Wes McKinney <wesm@apache.org>
Closes #20 from wesm/ARROW-44 and squashes the following commits:
df06ba1 [Wes McKinney] Add tests for scalars proxying implemented Python list type conversions, fix associated bugs
20fbdc1 [Wes McKinney] Draft scalar box types, no tests yet