pylama [mypy] linter messages don't appear in the "Problems" tab

[ashep]

Environment data

• VS Code version: 1.54.1
• Extension version (available under the Extensions sidebar): v2021.2.582707922
• OS and version: Linux x64 5.11.2-arch1-1
• Python version (& distribution if applicable, e.g. Anaconda): 3.5.10
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
• Relevant/affected Python packages and their versions: pylama-7.7.1, mypy-0.800
• Relevant/affected Python-related VS Code extensions and their versions: pylance-2021.3.0
• Value of the python.languageServer setting: pylance-2021.3.0

Expected behaviour

See mypy issues reported by pylama in the "Problems" tab.

Actual behaviour

pylama's mypy output is visible in the "Output tab", but not in the "Problems" tab.

Steps to reproduce:

[karthiknadig]

I am able to repro this, with following settings:

    "python.linting.pylamaEnabled": true,
    "python.linting.pylamaArgs": [
        "--linters",
        "mypy"
    ],

[nicolamarella]

I am not 100% it's related, but in my case it doesn't work no matter what, even without mypy. I was able to trace down the problem to the default parser and started worked on a PR here #18339

I will send an updated when I have successfully tested, will test mypy too.

UPDATE:
Althought I managed to fix the general output for me, for pylama, the mypy output has a slightly different output entry.
For instance:

# pylama/pycodestyle output line
src/lib/test_py.py:23:60 [E] E226 missing whitespace around arithmetic operator [pycodestyle]

# pylama/mypy output line
src/test_py.py:7:4 [E]  Argument 1 to "fn" has incompatible type "str"; expected "int" [mypy]

notice how the mypy output is missing the error code, something line E226. Now I could also add that to my PR, making it optional in the regex, but I am not 100% sure whether that's the right course of action. Might take a look at the pylama repo itself.

Tested with

def fn(a: int):
    pass


unused_var = 123
fn("1")

final note, this is my settings.json

"python.linting.pylamaArgs": ["--linters=pycodestyle,pylint,mypy"],