2,707 questions
1
vote
0
answers
27
views
Why doesn't mypy follow config in GitHub Actions?
If I run mypy locally it will only type check certain files because the pyproject.toml file has the following inclusion:
[tool.mypy]
files = [
"python/project/file1.py",
"python/...
- 4,758
1
vote
0
answers
93
views
Mypy plugin `get_method_hook` missing `body` in `ClassDef` for imported type
I'm having an issue with the get_method_hook in a simple mypy plugin. I'm not sure if it's a bug in mypy or if I have wrong expectations about the availability of information at a certain stage.
The ...
- 251
0
votes
1
answer
26
views
Use attrs or_ validator with mypy
I'm trying to use attrs to define a class that has an attribute that can be either a str or an int. The or_ validator see;s to be exactly what I need but mypy throws an error when using the exact ...
- 119
0
votes
1
answer
36
views
How to type hint a decorator to dictate some parameters but not all?
I'm looking of a way (the way) to type hint a decorator indicating the parameters that must exist only. The decorator does not change the signature of the function it wraps.
from functools import ...
- 14.8k
0
votes
0
answers
29
views
Use of subclasses of Generic in other classes
I am again fighting against the use of bound type variable in python.
Have a look at this example:
from typing import Generic, TypeVar, Any
ParameterType = TypeVar('ParameterType')
class Parameter(...
- 313
0
votes
1
answer
29
views
Access container class from contained class with python dataclasses
I have a parent class, that contains a child class. Both are implemented with python dataclasses. The classes look like this:
from __future__ import annotations
from dataclasses import dataclass
@...
- 175
0
votes
1
answer
40
views
Understanding unbound type error with mypy
I am new to static type checking in python and honestly I believed it was much easier that what it actually is.
Here is an ultra simplified version of my code:
from typing import Collection, TypeVar, ...
- 313
0
votes
0
answers
54
views
How can I fix pycham wrong django type hint
from django.db.models import QuerySet
member_meta_models: QuerySet[MemberWantedMetaModel] = MemberWantedMetaModel.objects.filter(member_id=member_id)
Pycharm says
Expected type QuerySet[...
- 1
4
votes
2
answers
112
views
Python generic type on function getting lost somewhere
Getting this typing error:
error: Incompatible types in assignment (expression has type "object", variable has type "A | B") [assignment]
With this code:
from dataclasses import ...
- 27.2k
1
vote
1
answer
104
views
What should typing be for __add__ in a subclass of list?
This is a simplification of my code:
# my_list.py
from __future__ import annotations
class MyList(list[int]):
def __add__(self, other: list[int]) -> MyList:
return MyList()
mypy says:
...
- 509
0
votes
1
answer
30
views
Why aren't sub-union types handled properly by type guards?
In the following code, the valid function and the invalid function do exactly the same thing. Why is MyPy happy with valid, but throws an error on invalid?
Isn't the TypeGuard suppose to handle that?
...
1
vote
1
answer
37
views
Type hint for itertools.product doesn't know length of elements
I am adding type hints to an old code of mine. However, I find with a "problem" I don't know how to solve. I have a function that looks like:
def f(x: tuple[tuple[int, int], ...]):
...
...
- 261
2
votes
1
answer
84
views
Is there a way to type hint pandas column names?
in a data postprocessing step I am creating a pandas DataFrame df_energy, whos columns are created according to the input data (differing each run). As column names I am using instances of a dataclass ...
- 29
0
votes
1
answer
83
views
Type alias for type of typevar and mypy
I have a type var that represents a child of specific interface
BuildableChild = TypeVar("BuildableChild", bound=Buildable)
The content of Buildable does not really matters, let's assume it ...
- 3
0
votes
2
answers
86
views
Python typing error when incrementing a dict value: 'Unsupported operand types for + ("object" and "int")'
I have this code:
result = {"AAA": "a", "BBB": "b", "Count": 0}
result["Count"] += 1
mypy generates this error message:
Unsupported operand ...
- 1,282