numcodecs: Pyinstaller failing on numcodecs blosc import

Minimal, reproducible code sample, a copy-pastable example if possible

from aicsimageio import AICSImage

then

pyinstaller -F -w main.py

Problem description

I’m using aicsimageio for loading CZI files and I’m trying to package it up into a stand-alone app for one of our EngD students to use.

The only reference I could find to my exact problem is this: https://github.com/napari/napari/issues/665#issuecomment-551965687

And I couldn’t find the ticket. So I thought I would raise it.

The issue is that the app works when run as a script, the app functions completely as expected. When I package it up I get the following error:

Traceback (most recent call last): File “main.py”, line 3, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “control_scheme_python.py”, line 11, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “chunking_logic.py”, line 6, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “aicsimageio_init_.py”, line 6, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “aicsimageio\aics_image.py”, line 10, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “xarray_init_.py”, line 1, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “xarray\tutorial.py”, line 13, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “xarray\backends_init_.py”, line 17, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “xarray\backends\zarr.py”, line 22, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “zarr_init_.py”, line 2, in <module> File “PyInstaller\loader\pyimod03_importers.py”, line 476, in exec_module File “zarr\codecs.py”, line 3, in <module> ImportError: cannot import name ‘Blosc’ from ‘numcodecs’ (C:\Users\iris\AppData\Local\Temp_MEI63202\numcodecs_init_.pyc)

I guess the expected behavior is: it runs.

I had a c++ installer (MS VS build tools 2019) and the build from pip for aicsimageio ran without error - including seeing the numcodecs build.

The most desirable and quickest solution I’m hoping for is that someone points out a stupid mistake I’ve made and I fix it easily 😃

Version and installation information

Please provide the following:

• Value of numcodecs.__version__ = 0.9.1
• Python 3.9.7
• Win 10 19042.1348
• using pip into a clean VM spun up exclusively for this bug_requirements.txt

I’ve had it on other versions of python and conda too.

Thanks