Cannot configure severity for partial error code

[Avasam]

I am trying to configure flake8 as such:

class test:
    __init__(self): pass  # pylint: disable=syntax-error

    a = 0
    c = 2
    b = 1

    if True:
        if True:
            pass

  "flake8.severity": {
    "convention": "Warning",
    "error": "Error",
    "fatal": "Error",
    "refactor": "Warning",
    "warning": "Warning",
    "info": "Warning",
    // builtins
    "A": "Warning",
    // mccabe
    "C": "Warning",
    // class attributes order
    "CCE": "Warning",
    // pycodestyles
    "E": "Warning",
    "E9": "Error", // Runtime
    "W": "Warning",
    // Pyflakes
    "F": "Warning",
    // PEP8 Naming convention
    "N": "Warning",
    // Simplify
    "SIM": "Warning",
    "SIM9": "Information",
    // PYI
    "Y": "Warning",
  },

Only single characters or full error code work. The following do nothing: CCE, E9, SIM, SIM9.

[karthiknadig]

The check happens here, code_type is basically category. Pattern matching not supported:

vscode-flake8/bundled/tool/server.py

Lines 108 to 118 in 42c7979

	def _get_severity(
	code: str, code_type: str, severity: Dict[str, str]
	) -> lsp.DiagnosticSeverity:
	"""Converts severity provided by linter to LSP specific value."""
	value = severity.get(code, None) or severity.get(code_type, "Error")
	try:
	return lsp.DiagnosticSeverity[value]
	except KeyError:
	pass
	return lsp.DiagnosticSeverity.Error

One of the reasons we don't allow full pattern matching, but only category or error code is this: let say you have E, E1, E13 all set to different severity, you now have to build a hierarchy that ensures that you check for E13 first, then E1, and then E, and before that you have to check for all absolute error codes.

[gschwaer]

It should be sufficient to iterate over the categories sorted by length from longest to shortest and pick the first that fits, right?