TypeError: 'type' object is not subscriptable

[Omri-Ben-Yair]

Describe the bug
Recently the type annotations changed from using typing Dict to just dict, this breaks support for python 3.8

The bug was introduced in mypy-boto3-glue = 1.35.87, it did not exists in 1.35.80, so probably introduced on Dec 12 by this commit

Only python > 3.9 support dict in type annotations.

The type looks like:

class RecipeActionOutputTypeDef(TypedDict):
    Operation: str
    Parameters: NotRequired[dict[str, str]]

To Reproduce
Steps to reproduce the behavior:

1. install mypy-boto3-glue = "1.35.87"
2. try to import a type which uses a dict like SchemaVersionListItemTypeDef, it will get an error on import phase

from mypy_boto3_glue.type_defs import SchemaVersionListItemTypeDef
...

Actual output

Traceback (most recent call last):
    from mypy_boto3_glue.type_defs import SchemaVersionListItemTypeDef
  File "project1/.venv/lib/python3.8/site-packages/mypy_boto3_glue/__init__.py", line 79, in <module>
    from .client import GlueClient
  File "project1/.venv/lib/python3.8/site-packages/mypy_boto3_glue/client.py", line 28, in <module>
    from .paginator import (
  File "project1/.venv/lib/python3.8/site-packages/mypy_boto3_glue/paginator.py", line 88, in <module>
    from .type_defs import (
  File "project1/.venv/lib/python3.8/site-packages/mypy_boto3_glue/type_defs.py", line 1863, in <module>
    "Parameters": NotRequired[dict[str, str]],
TypeError: 'type' object is not subscriptable

Additional context
Mac OS, python 3.8.16.
mypy-boto3-glue = 1.35.87

[vemel]

Hello! Thanks you for the report. All TypeDefs now use py39+ type annotations.

It is recommended to put mypy_boto3_* import into TYPE_CHECKING. This way you can make it work on py38, since all popular type checkers support subscriptable types.

from typing import TYPE_CHECKING

if TYPE_CHECKING:
   from mypy_boto3_glue.type_defs import SchemaVersionListItemTypeDef

If you use TypeDefs for something else, e. g., inheritance or runtime checks, add a fallback:

if TYPE_CHECKING:
   from mypy_boto3_glue.type_defs import SchemaVersionListItemTypeDef
else:
   SchemaVersionListItemTypeDef = object

Let me know if this works for you, or if you have a scenario in which it does not work.

[Omri-Ben-Yair]

Thanks for the clarification @vemel .

[vemel]

@Omri-Ben-Yair With the latest mypy-boto3-glue release you can use types in runtime on Python 3.8 like before. Please let me know if it works in your case.