fcrimins commented on issue #1093:
URL:
https://github.com/apache/iceberg-python/issues/1093#issuecomment-2369589615
I must have missed the "Falling back to pure Python Avro decoder, missing
Cython implementation" warning during installation, but I was indeed missing
Cython, which was causing a different `decoder_fast` related error during `make
test`:
```bash
~/iceberg-python$ make test
poetry run pytest tests/ -m "(unmarked or parametrize) and not integration"
=========================================================== test session
starts ============================================================
platform linux -- Python 3.10.12, pytest-7.4.4, pluggy-1.5.0
rootdir: /mnt/c/Users/.../iceberg-python
configfile: pyproject.toml
plugins: mock-3.14.0, checkdocs-2.10.1, requests-mock-1.12.1,
lazy-fixture-0.6.3
collected 3588 items / 2 errors / 865 deselected / 2723 selected
================================================================== ERRORS
==================================================================
_______________________________________________ ERROR collecting
tests/avro/test_decoder.py ________________________________________________
ImportError while importing test module
'/mnt/c/Users/.../iceberg-python/tests/avro/test_decoder.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib/python3.10/importlib/__init__.py:126: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
tests/avro/test_decoder.py:29: in <module>
from pyiceberg.avro.decoder_fast import CythonBinaryDecoder
E ModuleNotFoundError: No module named 'pyiceberg.avro.decoder_fast'
________________________________________________ ERROR collecting
tests/avro/test_reader.py ________________________________________________
ImportError while importing test module
'/mnt/c/Users/.../iceberg-python/tests/avro/test_reader.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib/python3.10/importlib/__init__.py:126: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
tests/avro/test_reader.py:24: in <module>
from pyiceberg.avro.decoder_fast import CythonBinaryDecoder
E ModuleNotFoundError: No module named 'pyiceberg.avro.decoder_fast'
========================================================= short test summary
info ==========================================================
ERROR tests/avro/test_decoder.py
ERROR tests/avro/test_reader.py
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 2 errors
during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
==================================================== 865 deselected, 2
errors in 23.91s ====================================================
make: *** [Makefile:42: test] Error 2
```
I was able to fix the test errors by following the Cython installation
instructions documented
[here](https://cython.readthedocs.io/en/latest/src/quickstart/install.html) and
then rebuilding.
```bash
~/iceberg-python$ sudo apt-get install build-essential python3-dev
~/iceberg-python$ pip install --user Cython
~/iceberg-python$ poetry build
```
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