[ARROW-666] [Python] Error in DictionaryArray __repr__

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Fix Version/s: 0.3.0
• Component/s: Python
• External issue URL: https://github.com/apache/arrow/issues/16289
• Assignee: Unassigned
• Reporter: Miki Tebeka
• Created: 20/Mar/17 10:16
• Updated: 11/Jan/23 07:10
• Resolved: 20/Mar/17 13:23

Description

d.py is

import pandas as pd
import pyarrow as pa

vals = pd.Series(['green', 'red', 'blue'] * 4)
d = pd.Series(['red', 'green', 'blue'])
print(d)
ind = vals.apply(pd.Index(d).get_loc)
print(vals)
print(ind)

v = pa.DictionaryArray.from_arrays(ind, d)
print(v)

Running this results in the following error:

╭─miki@xubi  python (git:ARROW-539) 
╰─<venv:python/venv>$ python d.py                             Mon Mar 20, 12:12 1 ↵
0      red
1    green
2     blue
dtype: object
0     green
1       red
2      blue
3     green
4       red
5      blue
6     green
7       red
8      blue
9     green
10      red
11     blue
dtype: object
0     1
1     0
2     2
3     1
4     0
5     2
6     1
7     0
8     2
9     1
10    0
11    2
dtype: int64
Traceback (most recent call last):
  File "d.py", line 12, in <module>
    print(v)
  File "pyarrow/array.pyx", line 215, in pyarrow.array.Array.__repr__ (/home/miki/work/2sigma/arrow/python/build/temp.linux-x86_64-3.6/array.cxx:4132)
    values = array_format(self, window=10)
  File "/home/miki/work/2sigma/arrow/python/pyarrow/formatting.py", line 27, in array_format
    for x in arr:
  File "pyarrow/array.pyx", line 209, in __iter__ (/home/miki/work/2sigma/arrow/python/build/temp.linux-x86_64-3.6/array.cxx:3959)
    yield self.getitem(i)
  File "pyarrow/array.pyx", line 255, in pyarrow.array.Array.getitem (/home/miki/work/2sigma/arrow/python/build/temp.linux-x86_64-3.6/array.cxx:4825)
    return scalar.box_scalar(self.type, self.sp_array, i)
  File "pyarrow/scalar.pyx", line 246, in pyarrow.scalar.box_scalar (/home/miki/work/2sigma/arrow/python/build/temp.linux-x86_64-3.6/scalar.cxx:4522)
    val = _scalar_classes[type.type.type]()
KeyError: 25
╭─miki@xubi  python (git:ARROW-539) 
╰─<venv:python/venv>$