Module ... has no attribute ... when #type: ignore[misc] is set at the top of a module

[johanvergeer]

In our mypy config file we do not allow Any to be used. Because this cannot be avoided all the time we use #type: ignore[misc] at the top of a module.

We created a module called typing.py.

# type: ignore[misc] # Ignores 'Any' input parameter
from typing import Any, Iterable

JsonSerializable = Any
CsvSerializable = Iterable[Any]

This is imported in another module.

from my_app.typing import JsonSerializable

def foo(data: JsonSerializable) -> None:
    ...

Actual result

PS C:\workspace\my_app> mypy
src\my_app\foo.py:6: error: Module 'my_app.typing' has no attribute 'JsonSerializable'  [attr-defined]
    from my_app.typing import JsonSerializable

Found 1 errors in 1 files (checked 6 source files)

Expected result

PS C:\workspace\my_app> mypy
Success: no issues found in 6 source files

How did we solve it?

When we change typing.py so it ignores Any on each line we don't have any issues.

from typing import Any, Iterable

JsonSerializable = Any  # type: ignore[misc] # Ignores 'Any' input parameter
CsvSerializable = Iterable[Any]  # type: ignore[misc] # Ignores 'Any' input parameter

Configuration

• Python 3.8.2
• Mypy 0.782
• Windows 10
• Not in a virtualenv

.mypy.ini

[mypy]
python_version = 3.8

disallow_any_expr = False
disallow_any_decorated = False
disallow_any_explicit = True
disallow_any_generics = True
disallow_subclassing_any = True

disallow_untyped_calls = True
disallow_untyped_defs = True
check_untyped_defs = False
disallow_untyped_decorators = False

no_implicit_optional = True

warn_redundant_casts = True
warn_unused_ignores = True
warn_return_any = True
warn_unreachable = True
strict_equality = True

allow_redefinition = False

[ilevkivskyi]

Yeah, this looks like a bug.

[RomainMuller]

I've got the exact same issue happening with file-wide # type: ignore[no-any-return], so I also believe this isn't quite specific to ignoring any particular code; instead related to file-wide ignoring anything.

[MetRonnie]

I had the same error message when importing from an auto-generated protobuf _pb2.py file, which has # type: ignore as the first line. I managed to suppress the errors by adding # type: ignore to the end of every line where we imported from the protobuf file, but that's pretty annoying.

[aberres]

Yeps, same problem here.

[dpinol]

The workaround at the description is a pain when "type: ignore" needs to be placed in hundreds of lines.
Is there any other workaround?

[hauntsaninja]

Maybe a per module https://mypy.readthedocs.io/en/stable/config_file.html#confval-ignore_errors works for your use case?

[zplizzi]

Fwiw, I replaced # type: ignore with # mypy: ignore-errors and this issue seemed to go away. Not sure if this works for ignoring specific errors though.