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sqlalchemy-bot opened this issue Sep 13, 2018 · 6 comments
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DeprecationWarning for inspect.formatargspec #507

sqlalchemy-bot opened this issue Sep 13, 2018 · 6 comments
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bug Something isn't working py3k
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@sqlalchemy-bot
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Migrated issue, originally created by Jakub Gocławski (@jgoclawski)

Since pytest now displays DeprecationWarning by default, our tests on Python 3.7. are now full of:

/usr/local/lib/python3.7/site-packages/alembic/util/langhelpers.py:91: DeprecationWarning: `formatargspec` is deprecated since Python 3.5. Use `signature` and the `Signature` object directly
 formatvalue=lambda x: '=' + x)

The warning is displayed 100+ times for a small project.
Seems like a followup of #458, but inspect.formatargspec is still used twice in langhelpers.py.

For now our workaround is to set:

[tool:pytest]
filterwarnings =
    always
    ignore::DeprecationWarning:alembic[.*]
@sqlalchemy-bot
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Changes by Jakub Gocławski (@jgoclawski):

  • edited description

@sqlalchemy-bot
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Michael Bayer (@zzzeek) wrote:

I really thought this had been reported, although I might be thinking of a similar issue in dogpile. Here we need to port the patch from SQLAlchemy https://bitbucket.org/zzzeek/sqlalchemy/commits/e81102fbd7e03713ffd0e25b39d, PRs can work here.

@sqlalchemy-bot
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Changes by Michael Bayer (@zzzeek):

  • set milestone to "fasttrack"

@sqlalchemy-bot sqlalchemy-bot added the bug Something isn't working label Nov 27, 2018
@sqlalchemy-bot sqlalchemy-bot added this to the fasttrack milestone Nov 27, 2018
@jared-mackey
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@zzzeek Any update on fixing these?

@zzzeek
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zzzeek commented Nov 27, 2018

looks like it's here: https://gerrit.sqlalchemy.org/#/c/sqlalchemy/alembic/+/933/ have had no time to go through outstanding gerrits ready for merge

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zzzeek commented Nov 28, 2018

need to add collections.abc as well as that also emits deprecation warnings

@zzzeek zzzeek added the py3k label Nov 28, 2018
vvvrrooomm pushed a commit to vvvrrooomm/alembic that referenced this issue Jan 10, 2019
@stj @zzzeek
Vendor python3 formatargspec, import from collections.abc
e135ba4 
Resolved remaining Python 3 deprecation warnings, covering
the use of inspect.formatargspec() with a vendored version
copied from the Python standard library, importing
collections.abc above Python 3.3 when testing against abstract
base classes, fixed one occurrence of log.warn(), as well as a few
invalid escape sequences.

Add DeprecationWarning to the test suite as an error raise
as has been the case within SQLAlchemy for some time now.

Fixes: sqlalchemy#507
Co-authored-by: Mike Bayer <mike_mp@zzzcomputing.com>
Change-Id: I121121b3d2dd90e6f3c9b16dec2fc80b9699c400
Pull-request: https://bitbucket.org/zzzeek/alembic/pull-requests/85
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