Type checking for *args and **kwargs when passing them to another function
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 32/100
Research direction
Start with the wrapper and inner-function examples in the issue, then read the linked mypy#19302 discussion for the existing proposal and constraints. Done should be a documented, agreed approach for deriving or declaring wrapper argument types from the function or constructor receiving *args and **kwargs.
Written by the indexing model from the issue text.
Description
Problem:
I am writing a python application, and I made a function that creates an object and passes its additional *args and **kwargs to object's constructor and takes few its own arguments. I want to make *args and **kwargs typed exactly as inner function's arguments.
Description and examples:
A simple example with two functions:
def inner(a: int, b: int) -> None:
...
def wrapper(arg1: str, *args, **kwargs) -> None:
inner(*args, **kwargs) # It will automatically detect passing arguments to another function
In my case, inner is object constructor, I gave an example with functions to make it more simple.
Type checkers should see wrapper's signature like this:
def wrapper(arg1: str, a: int, b: int):
...
It may be enabled by default when passing *args and **kwargs to another function is detected or it may be enabled by adding a decorator to the function.
Detailed description:
Already suggested this to mypy, detailed description of this feature can be found here: python/mypy#19302.
- Dominant language
- Python
- Stars
- 1.8k
- Forks
- 302
- Avg merge
- 23h
- Merged PRs (30d)
- 8
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
More from python/typing
-
topic: typing spec
Difficulty 2/5 1-3 hours Newbie friendliness 72/100
-
topic: typing spec
Difficulty 2/5 1-3 hours Newbie friendliness 75/100
-
topic: documentation
Difficulty 2/5 1-3 hours Newbie friendliness 76/100
-
topic: documentation
Difficulty 2/5 1-3 hours Newbie friendliness 65/100
-
topic: conformance tests topic: typing spec
Difficulty 3/5 1-2 days Newbie friendliness 72/100
Similar issues
-
bug
Difficulty 2/5 1-3 hours Newbie friendliness 90/100
learningequality/ricecooker#747 ·
-
Difficulty 2/5 1-3 hours Newbie friendliness 68/100
BSData/horus-heresy-3rd-edition#3171 ·
-
enhancement
Difficulty 2/5 1-3 hours Newbie friendliness 72/100
-
Difficulty 2/5 1-3 hours Newbie friendliness 76/100
run-llama/llama_index#23199 ·
-
Difficulty 2/5 1-3 hours Newbie friendliness 84/100
KhronosGroup/glTF-Blender-IO#2769 ·