Allow log levels from lowercase (#482)

* feat: allow log levels from any case

* feat: check python version to import self

* feat: resolve python 3.10 issue

---------

Co-authored-by: cognite-bulldozer[bot] <51074376+cognite-bulldozer[bot]@users.noreply.github.com>

Author: toondaey

cognite/extractorutils/unstable/configuration/models.py

@@ -405,6 +405,15 @@ class LogLevel(Enum):
     INFO = "INFO"
     DEBUG = "DEBUG"
 
+    @classmethod
+    def _missing_(cls, value: object) -> "LogLevel":
+        if not isinstance(value, str):
+            raise ValueError(f"{value} is not a valid log level")
+        for member in cls:
+            if member.value == value.upper():
+                return member
+        raise ValueError(f"{value} is not a valid log level")
+
 
 class LogFileHandlerConfig(ConfigModel):
     """

tests/test_unstable/test_configuration.py

@@ -7,6 +7,7 @@
 from cognite.extractorutils.unstable.configuration.loaders import ConfigFormat, load_io
 from cognite.extractorutils.unstable.configuration.models import (
     ConnectionConfig,
+    LogLevel,
     TimeIntervalConfig,
     _ClientCredentialsConfig,
 )
@@ -212,3 +213,14 @@ def test_from_env() -> None:
 
     # Check that the produces cogniteclient object is valid
     assert len(client.assets.list(limit=1)) == 1
+
+
+def test_setting_log_level_from_any_case() -> None:
+    log_level = LogLevel("DEBUG")
+    assert log_level == LogLevel.DEBUG
+
+    log_level = LogLevel("debug")
+    assert log_level == LogLevel.DEBUG
+
+    with pytest.raises(ValueError):
+        LogLevel("not-a-log-level")