Comments (4)
Note that this can be even reduced down to
@runtime_validation
def foo(self, arg: Type[T]) -> T:
return arg()
Apparently that's the Type[T]
that causes the problem, because changing it to T
makes it work.
from enforce.
Is this happening in the dev branch as well? It might be related to the fact that Type
construct is not properly supported yet. However, I will have a look into it later this week.
from enforce.
If it is actually a problem with Type
only, can you rename the issue to reflect it? Thanks.
from enforce.
Please note that in early versions of typing.py module the Type
symbol does not exist. Could you please make sure that it is not imported by enforce ? Otherwise new versions would break on our production environment (python 3.5.1, with no possibility to update the typing module using pip).
In all of my code to cope with this restriction I always quote Type
when used in type hints, and add the following import:
try:
from typing import Type
except ImportError:
# normal for old versions of typing
pass
Of course in your case you do want to reason about a type hint being the Type
symbol, so I suggest the following import trick:
```python
try:
from typing import Type
except ImportError:
# normal for old versions of typing
class Type:
pass
I guess that should do the trick.
from enforce.
Related Issues (20)
- License file
- enforce on static methods HOT 1
- runtime_validation yields a false positive when inheritance is involved HOT 2
- enforce is not transparent for Callable types - EnforceProxy HOT 2
- Typing error HOT 1
- It's impossible to install v 0.3.5 (`dev` branch) HOT 1
- Enable `runtime_validation` package/module-wide
- TypeError: 'NoneType' object is not iterable when using Optional[Tuple[str, str]]
- __init__ signature is not preserved for Generic classes HOT 1
- Type check mypy TypedDict
- enforce ignore default values
- not compatible with python 3.7 HOT 9
- Forward references on classes
- @runtime_validation leaks refcounts and therefore causes memory leaks
- New enforce fork for Python 3.5.10, 3.6, 3.7, 3.8, 3.9 HOT 10
- `AttributeError: can't set attribute` with namedtuple HOT 1
- Python 3.8 AttributeError: module 'typing' has no attribute 'TupleMeta' HOT 1
- Data validation via `typing.Annotated`
- Support for `@overload`ed callables
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from enforce.