Bugfix for commit 7bab3ac

Author: erezsh

data_diff/config.py

@@ -26,7 +26,7 @@ def _apply_config(config: Dict[str, Any], run_name: str, kw: Dict[str, Any]):
     else:
         run_name = "default"
 
-    if "database1" in kw:
+    if kw.get("database1") is not None:
         for attr in ("table1", "database2", "table2"):
             if kw[attr] is None:
                 raise ValueError(f"Specified database1 but not {attr}. Must specify all 4 arguments, or niether.")