Pooch update breaks import #5528
Description
Description
Pooch recently updated to version 1.5.0. This moved the hash functions to their own module, so the current method of importing them now fails. Further, the fallback for if pooch is not installed doesn't work because the exact error is different.
Way to reproduce
import skimage.metricsNote, install pooch 1.5.0 first.
You'll see
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File ".../python3.8/site-packages/skimage/__init__.py", line 135, in <module>
from .data import data_dir
File ".../python3.8/site-packages/skimage/data/__init__.py", line 64, in <module>
from pooch.utils import file_hash
ImportError: cannot import name 'file_hash' from 'pooch.utils' (.../python3.8/site-packages/pooch/utils.py)
Version information
# Paste the output of the following python commands
from __future__ import print_function
import sys; print(sys.version)
import platform; print(platform.platform())
import skimage; print("scikit-image version: {}".format(skimage.__version__))
import numpy; print("numpy version: {}".format(numpy.__version__))# your output here
3.8.10 (default, May 5 2021, 03:01:07)
[GCC 7.5.0]
Linux-5.4.0-80-generic-x86_64-with-glibc2.27
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File ".../python3.8/site-packages/skimage/__init__.py", line 135, in <module>
from .data import data_dir
File ".../python3.8/site-packages/skimage/data/__init__.py", line 64, in <module>
from pooch.utils import file_hash
ImportError: cannot import name 'file_hash' from 'pooch.utils' (.../python3.8/site-packages/pooch/utils.py)
numpy version: 1.21.2I'm using scikit-image version: 0.18.2
Possible Fix
One solution would be to change skimage/data/__init__.py, where it reads
from pooch.utils import file_hash
to
try:
from pooch.utils import file_hash
except ImportError:
from pooch.hashes import file_hash