DEFAULT_TYPES cannot be used on Validators using TypeCheckers with 4.0.0

[retr0h]

Describe the bug

Seeing the following error as soon as we started using 4.0.0.

self = <class 'jsonschema.validators.create.<locals>.Validator'>

    def _DEFAULT_TYPES(self):
        if self._CREATED_WITH_DEFAULT_TYPES is None:
>           raise _DontDoThat()
E           jsonschema.validators._DontDoThat: DEFAULT_TYPES cannot be used on Validators using TypeCheckers

self       = <class 'jsonschema.validators.create.<locals>.Validator'>

How To Reproduce

import contextlib

import flask_restx

@contextlib.contextmanager
def open_file(filename, mode='r'):
    with open(filename, mode) as stream:
        yield stream

def test_open_file(fs):
    f = 'foo.txt'
    fs.create_file(f, contents='foo')

    with open_file(f) as stream:
        assert 'foo' == stream.read()

Your enviroment
Please run the following and paste the output.

Darwin-19.3.0-x86_64-i386-64bit

Python 3.7.6 (default, Jan 15 2020, 13:46:19)
[Clang 11.0.0 (clang-1100.0.33.17)]

pyfakefs 4.0.0

[retr0h]

Ahh... looks to be related to flask-restx. As soon as my tests are loaded which use flask-restx, I get the error reported above.

[mrbean-bremen]

We're used to get issues right after a release, but that was really fast... can you elaborate on that? Can we reproduce this?

[retr0h]

We're used to get issues right after a release, but that was really fast... can you elaborate on that? Can we reproduce this?

HAHAH I was working on a project which uses this project quite a bit :) Thanks CI lol

I updated the example above. It looks as though simply importing flask_restx introduces the issue.

[mrbean-bremen]

I guess you would like a patch release with the fix?

[mrbean-bremen]

Can you please check if it works for you with current master?

[mrbean-bremen]

Ok, I made a new patch release.

[retr0h]

Looks good! Thanks for the quick reply!