py37-astropy @5.0 fails import

[odysseus9672 (Sean Lake)]

The recent update to astropy 5.0 for py37-astropy doesn't work. It's missing a dependency, perhaps? When I try to use it I get an error.

This is on MacPorts 2.7.1 with XCode 11.5 on Mac OS X 10.15.7.

Here's the output:

Traceback (most recent call last):
  File "./Analysis_Pix_v7.py", line 96, in <module>
    import astropy.io.ascii as aptxt
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/__init__.py", line 42, in <module>
    from . import config as _config  # noqa: E402
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/config/__init__.py", line 10, in <module>
    from .configuration import *
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/config/configuration.py", line 24, in <module>
    from astropy.utils import find_current_module, silence
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/utils/__init__.py", line 17, in <module>
    from .codegen import *  # noqa
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/utils/codegen.py", line 13, in <module>
    from .introspection import find_current_module
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/astropy/utils/introspection.py", line 11, in <module>
    from importlib import metadata
ImportError: cannot import name 'metadata' from 'importlib' (/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py)

[Schamschula (Marius Schamschula)]

I don't see this error with py39-astropy.

On further research, I find that Python 3.8 is now the minimum version supported by astropy 5.0.

[Schamschula (Marius Schamschula)]

I can pin py37-astropy to version 4.3.1.

[Schamschula (Marius Schamschula)]

Does ​https://trac.macports.org/changeset/9e9ee48486e0a390b5aa6602031ac969d0503d87/macports-ports fix this?

[reneeotten (Renee Otten)]

assuming that it did.... @odysseus9672 please give it a try and if you're still having issues feel free to reopen this ticket.

[odysseus9672 (Sean Lake)]

So, I still see this error when I attempt to import astropy in python 3.7. So, the pinning of py37-astropy to version 4.3.1 hasn't made it to my port tree and the fixes that help 3.8+ don't help. So, no, this isn't fixed.

[Schamschula (Marius Schamschula)]

Thanks for that info! I'll pin the older version for python 3.7.

[odysseus9672 (Sean Lake)]

Thanks! It looks like one more thing needs to be done for the version pinning to work. When I uninstall py37-astropy to get rid of 5.0 and then attempt to reinstall to get 4.3.1, I get the following error:

--->  Computing dependencies for py37-astropy
--->  Fetching archive for py37-astropy
--->  Attempting to fetch py37-astropy-4.3.1_1.darwin_19.x86_64.tbz2 from https://packages.macports.org/py37-astropy
--->  Attempting to fetch py37-astropy-4.3.1_1.darwin_19.x86_64.tbz2 from https://ywg.ca.packages.macports.org/mirror/macports/packages/py37-astropy
--->  Attempting to fetch py37-astropy-4.3.1_1.darwin_19.x86_64.tbz2 from https://kmq.jp.packages.macports.org/py37-astropy
--->  Fetching distfiles for py37-astropy
--->  Attempting to fetch astropy-5.0.tar.gz from https://files.pythonhosted.org/packages/source/a/astropy
--->  Verifying checksums for py37-astropy
Error: Checksum (rmd160) mismatch for astropy-5.0.tar.gz
Error: Checksum (sha256) mismatch for astropy-5.0.tar.gz
Error: Checksum (size) mismatch for astropy-5.0.tar.gz
Error: Failed to checksum py37-astropy: Unable to verify file checksums
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-astropy/py37-astropy/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there
is a bug.
Error: Processing of port py37-astropy failed

[Schamschula (Marius Schamschula)]

Why is it fetching the source code for version 5.0?

It doesn't make sense. It attempted to fetch the binaries for version 4.3.1.

Can you attach the log file? Actually, a log file with debug mode (i.e. sudo port install -d py37-astropy) might be more useful.

[Schamschula (Marius Schamschula)]

In d85499e3db4feac909e466d2e4d6c4378db42e0a/macports-ports (master):

py-astropy: add distname and dist_subdir for py37 subport

Closes: #64302
See: #64029

[odysseus9672 (Sean Lake)]

Build log for py37-astropy