Python write_deltalake fails if pyarrow table contains binary columns ending with 0x5c

[sfilimonov-exos]

Environment

Delta-rs version: 0.7.0

Environment:

• OS: OS X or Ubuntu 22.04

---

Bug

What happened: write_deltalake fails when trying to add file to the transaction because it cannot encode some binary values.

Exception ignored in: 'pyarrow._dataset._filesystemdataset_write_visitor'
Traceback (most recent call last):
  File "/Users/abc/repos/study_python/venv/lib/python3.9/site-packages/deltalake/writer.py", line 229, in visitor
    json.dumps(stats, cls=DeltaJSONEncoder),
  File "/usr/local/homebrew/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/__init__.py", line 234, in dumps
    return cls(
  File "/usr/local/homebrew/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/local/homebrew/Cellar/python@3.9/3.9.16/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/Users/abc/repos/study_python/venv/lib/python3.9/site-packages/deltalake/writer.py", line 315, in default
    return obj.decode("unicode_escape")
UnicodeDecodeError: 'unicodeescape' codec can't decode byte 0x5c in position 1: \ at end of string

How to reproduce it:

import pyarrow

from deltalake.writer import write_deltalake

value = b'\x00\\'
pa_table = pyarrow.Table.from_pydict({'field_one': [value]})

write_deltalake("some_table_1234", pa_table)