DeprecationWarning: generator 'RevisionMap._iterate_revisions' raised StopIteration (PEP 479)

[sqlalchemy-bot]

Migrated issue, originally created by Christopher Sang (@csang)

Run a downgrade on an initially empty db, using a command like:

python -Wall `which alembic` downgrade base

The following DeprecationWarning occurs:

/usr/local/lib/python3.6/site-packages/alembic/script/base.py:348: DeprecationWarning: generator 'RevisionMap._iterate_revisions' raised StopIteration
    migration.MigrationStep.downgrade_from_script(

Environment:

• alembic 0.9.5
• python 3.6.2
• postgresql 9.6.5 (probably does not make a difference)
• psycopg2 2.7.3.1

See https://www.python.org/dev/peps/pep-0479/

[sqlalchemy-bot]

Michael Bayer (@zzzeek) wrote:

https://gerrit.sqlalchemy.org/573

[sqlalchemy-bot]

Michael Bayer (@zzzeek) wrote:

Clean up all Python 3.6 warnings

Fixed a few Python3.6 deprecation warnings by replacing StopIteration
with return, as well as using getfullargspec() instead of
getargspec() under Python 3.

Additionally fixed docstrings with backslashes needing r'', filehandles
not explicitly closed, accommodate for .pyc files not necessarily present.

Change-Id: Id9791c5fa8b4b1f3e4e36f237a8a8ebcef4aaaba
Fixes: #458

→ 6c29346

[sqlalchemy-bot]

Changes by Michael Bayer (@zzzeek):

• changed status to closed