feat(config): add explicit validation for required configuration fields

Author: Sourish-07

qlib/config.py

@@ -131,11 +131,11 @@ def register_from_C(config, skip_register=True):
         if C.registered and skip_register:
             return
 
-        
-        C.set_conf_from_C(config)
 
+        C.set_conf_from_C(config)
 
-        C.validate()
+        if not skip_register:
+            C.validate()
 
         if C.logging_config:
             set_log_with_config(C.logging_config)

qlib/tests/test_config_validation.py

@@ -1,17 +1,17 @@
 import pytest
-from qlib.config import C, Config
+
+from qlib.config import Config
 
 
 def test_missing_provider_uri_raises():
-    
     default_conf = {
         "provider_uri": None,
-        "region": "us"
+        "region": "us",
     }
 
     cfg = Config(default_conf)
 
     with pytest.raises(ValueError) as exc:
         cfg.validate()
 
-    assert "provider_uri must be set" in str(exc.value)
+    assert "provider_uri must be set" in str(exc.value)