Function is missing type annotation for __init__(self)

[alex65536]

The minimal code is:

class MyClass:
    def __init__(self):
        pass

When running mypy code.cpp with the following mypy.ini

[mypy]
ignore_missing_imports = True
disallow_untyped_defs = True

it says:

code.py:2: error: Function is missing a type annotation

The expected result is not errors

[JelleZijlstra]

That's because you have the disallow_untyped_defs flag on, which produces an error for function definitions without a type annotation. You should add -> None to the annotation for your method, or not use disallow_untyped_defs.

(Also, I'm happy to see that we're using mypy to check C++ code now. :) )

[andreymal]

@JelleZijlstra but -> None is implied (#604), so def __init__(self) actually has a type annotation, so this is a mypy bug?

[JelleZijlstra]

We decided at the time to still require-> None for initializers with no arguments, so that the default would still be to leave these functions unchecked.