__i<magic>__ method incompatible with __<magic>__ of superclass
Open
@Michael0x2a is already working on this.
Since Jan 19, 2019.
bug
documentation
needs discussion
priority-1-normal
- Dominant language
- Python
- Stars
- 20.6k
- Forks
- 3.3k
- PR merge metrics
- PR metrics pending
Description
I'm recieving an a error within folowing code:
class A:
def __add__(self, other) -> int:
...
def __iadd__(self, other) -> 'A':
...
class C(A):
# error: Return type of "__iadd__" incompatible with "__add__" of supertype "A"
def __iadd__(self, other) -> 'C':
...
I'm not sure that __add__ and __iadd__ methods have to be compatible.
And, if belief to the MyPy in the signature of class A, that not produce the error, MyPy also doesn't think they have to be compatible...
Contributor guide
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.
Assessment
This issue has not been assessed yet.