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Bug 1792055 - python-blosc fails to build with Python 3.9: 'array.array' object has no attribute 'tostring'
Summary: python-blosc fails to build with Python 3.9: 'array.array' object has no attr...
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: python-blosc
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Thibault North
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON39
TreeView+ depends on / blocked
 
Reported: 2020-01-16 23:00 UTC by Miro Hrončok
Modified: 2020-05-27 17:50 UTC (History)
5 users (show)

Fixed In Version: python-blosc-1.8.1-7.fc33
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-05-27 17:50:27 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Miro Hrončok 2020-01-16 23:00:24 UTC 
python-blosc fails to build with Python 3.9.0a2.

FAIL: compress (blosc.toplevel)
Doctest: blosc.toplevel.compress
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib64/python3.9/doctest.py", line 2197, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for blosc.toplevel.compress
  File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 396, in compress

----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 440, in blosc.toplevel.compress
Failed example:
    a_bytesobj = a.tostring()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.compress[2]>", line 1, in <module>
        a_bytesobj = a.tostring()
    AttributeError: 'array.array' object has no attribute 'tostring'
----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 441, in blosc.toplevel.compress
Failed example:
    c_bytesobj = blosc.compress(a_bytesobj, typesize=4)
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.compress[3]>", line 1, in <module>
        c_bytesobj = blosc.compress(a_bytesobj, typesize=4)
    NameError: name 'a_bytesobj' is not defined
----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 442, in blosc.toplevel.compress
Failed example:
    len(c_bytesobj) < len(a_bytesobj)
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.compress[4]>", line 1, in <module>
        len(c_bytesobj) < len(a_bytesobj)
    NameError: name 'c_bytesobj' is not defined


======================================================================
FAIL: decompress (blosc.toplevel)
Doctest: blosc.toplevel.decompress
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib64/python3.9/doctest.py", line 2197, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for blosc.toplevel.decompress
  File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 549, in decompress

----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 579, in blosc.toplevel.decompress
Failed example:
    a_bytesobj = a.tostring()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.decompress[2]>", line 1, in <module>
        a_bytesobj = a.tostring()
    AttributeError: 'array.array' object has no attribute 'tostring'
----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 580, in blosc.toplevel.decompress
Failed example:
    c_bytesobj = blosc.compress(a_bytesobj, typesize=4)
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.decompress[3]>", line 1, in <module>
        c_bytesobj = blosc.compress(a_bytesobj, typesize=4)
    NameError: name 'a_bytesobj' is not defined
----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 581, in blosc.toplevel.decompress
Failed example:
    a_bytesobj2 = blosc.decompress(c_bytesobj)
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.decompress[4]>", line 1, in <module>
        a_bytesobj2 = blosc.decompress(c_bytesobj)
    NameError: name 'c_bytesobj' is not defined
----------------------------------------------------------------------
File "/builddir/build/BUILDROOT/python-blosc-1.8.1-4.fc32.x86_64/usr/lib64/python3.9/site-packages/blosc/toplevel.py", line 582, in blosc.toplevel.decompress
Failed example:
    a_bytesobj == a_bytesobj2
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python3.9/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest blosc.toplevel.decompress[5]>", line 1, in <module>
        a_bytesobj == a_bytesobj2
    NameError: name 'a_bytesobj' is not defined


See https://docs.python.org/3.9/whatsnew/3.9.html#removed

"array.array: tostring() and fromstring() methods have been removed. They were aliases to tobytes() and frombytes(), deprecated since Python 3.2."


For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.9/fedora-rawhide-x86_64/01145949-python-blosc/

For all our attempts to build python-blosc with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/python-blosc/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.9.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.
Comment 1 Karthikeyan Singaravelan 2020-01-22 12:19:18 UTC 
Upstream report : https://github.com/Blosc/python-blosc/issues/217
Comment 2 Ben Cotton 2020-02-11 17:29:10 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora 32 development cycle.
Changing version to 32.
Comment 3 Miro Hrončok 2020-05-25 13:02:35 UTC 
This comment is mass posted to all bugs blocking the Python 3.9 tracker, sorry if it is not 100 % relevant. When in doubt, please ask.


The Python 3.9 rebuild is in progress in a Koji side tag.

If you fix this bug, please don't rebuild the package in regular rawhide, but do it in the side tag with:

    $ fedpkg build --target=f33-python

The rebuild is progressing slowly and it is possible this package won't have all the required build dependencies yet. If that's the case, please just leave the fix committed and pushed and we will eventually rebuild it for you.

You are not asked to go and try rebuild all the missing dependencies yourself. If you know there is a bootstrap loop in the dependencies, let me know and we can untangle it together.

If you want to test your fix or reproduce the failure, you can still use the Copr repo mentioned in the initial comment of this bug: https://copr.fedorainfracloud.org/coprs/g/python/python3.9/
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