FIX: Fix get_dataset_condition param handling

Author: cjdsellers

databento/historical/api/metadata.py

@@ -4,7 +4,6 @@
 import pandas as pd
 from databento.common.enums import Dataset, Encoding, FeedMode, Schema, SType
 from databento.common.parsing import (
-    datetime_to_date_string,
     datetime_to_string,
     optional_date_to_string,
     optional_datetime_to_string,
@@ -270,8 +269,8 @@ def get_dataset_condition(
         """
         params: List[Tuple[str, Optional[str]]] = [
             ("dataset", dataset),
-            ("start_date", datetime_to_date_string(start_date)),
-            ("end_date", datetime_to_date_string(end_date)),
+            ("start_date", optional_date_to_string(start_date)),
+            ("end_date", optional_date_to_string(end_date)),
         ]
 
         response: Response = self._get(

examples/historical_metadata_get_dataset_condition.py

@@ -0,0 +1,14 @@
+from pprint import pprint
+
+import databento as db
+
+
+if __name__ == "__main__":
+    db.log = "debug"  # Optional debug logging
+
+    key = "YOUR_API_KEY"
+    client = db.Historical(key=key)
+
+    condition = client.metadata.get_dataset_condition(dataset="XNAS.ITCH")
+
+    pprint(condition)