Issue with mypy and the new version of alembic (1.7.1 agaist 1.6.5)

[Stéphane Brunner]

Hello,

In the new version, I get the following error with my mypy check:

Traceback (most recent call last):

File "/usr/local/bin/prospector", line 8, in <module>

sys.exit(main())

File "/usr/local/lib/python3.8/dist-packages/prospector/run.py", line 181, in main

prospector.execute()

File "/usr/local/lib/python3.8/dist-packages/prospector/run.py", line 70, in execute

messages += tool.run(found_files)

File "/usr/local/lib/python3.8/dist-packages/prospector/tools/mypy/__init__.py", line 90, in run

result = self.checker.run(paths)

File "mypy/api.py", line 69, in run

File "mypy/api.py", line 58, in _run

File "mypy/api.py", line 69, in <lambda>

File "mypy/main.py", line 87, in main

File "mypy/main.py", line 165, in run_build

File "mypy/build.py", line 179, in build

File "mypy/build.py", line 254, in _build

File "mypy/build.py", line 2697, in dispatch

File "mypy/build.py", line 3021, in process_graph

File "mypy/build.py", line 3138, in process_stale_scc

File "mypy/build.py", line 2288, in write_cache

File "mypy/build.py", line 1475, in write_cache

File "mypy/nodes.py", line 313, in serialize

File "mypy/nodes.py", line 3149, in serialize

File "mypy/nodes.py", line 3083, in serialize

AssertionError: Definition of alembic.runtime.migration.EnvironmentContext is unexpectedly incomplete

Is it an issue in the newly added types in alembic?

Thanks in advance
Stéphane Brunner

[Mike Bayer]

this is issue https://github.com/sqlalchemy/alembic/issues/897 and we don't know how to fix it.  suggestions welcome.

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[Stéphane Brunner]

OK, thanks for the information :-)