Mypy does not allow using the root validator with arguments other than pre or _func

[j0z89t-c927815636lo0]

Bug

Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":

             pydantic version: 1.4
            pydantic compiled: True
                 install path: /home/[username]/Desktop/[project]/env/lib/python3.6/site-packages/pydantic
               python version: 3.6.9 (default, Nov  7 2019, 10:44:02)  [GCC 8.3.0]
                     platform: Linux-5.3.0-26-generic-x86_64-with-Ubuntu-18.04-bionic
     optional deps. installed: ['typing-extensions']

Code:

    @root_validator(pre=False, skip_on_failure=True)
    def test_validator(cls, values):
        return values

Output:

test.py:5: error: No overload variant of "root_validator" matches argument types "bool", "bool"
test.py:5: note: Possible overload variants:
test.py:5: note:     def root_validator(_func: Callable[..., Any]) -> classmethod
test.py:5: note:     def root_validator(*, pre: bool = ...) -> Callable[[Callable[..., Any]], classmethod]

[j0z89t-c927815636lo0]

It seems like the tests are not checked with mypy.

[samuelcolvin]

Thanks for reporting, this should be fixed in #1204. It be fixed in the next release.