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  1. Apache Arrow
  2. ARROW-5201

[Python] Import ABCs from collections is deprecated in Python 3.7

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      From running the tests, I see a few deprecation warnings related to that on Python 3, abstract base classes should be imported from `collections.abc` instead of `collections`:

      pyarrow/tests/test_array.py:808
        /home/joris/scipy/repos/arrow/python/pyarrow/tests/test_array.py:808: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
          pa.struct([pa.field('a', pa.int64()), pa.field('b', pa.string())]))
      
      pyarrow/tests/test_table.py:18
        /home/joris/scipy/repos/arrow/python/pyarrow/tests/test_table.py:18: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
          from collections import OrderedDict, Iterable
      
      pyarrow/tests/test_feather.py::TestFeatherReader::test_non_string_columns
        /home/joris/scipy/repos/arrow/python/pyarrow/pandas_compat.py:294: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
          elif isinstance(name, collections.Sequence):

      Those could be imported depending on python 2/3 in the ``pyarrow.compat`` module.

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              • Assignee:
                jorisvandenbossche Joris Van den Bossche
                Reporter:
                jorisvandenbossche Joris Van den Bossche
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