Add RemoteDandiset.has_data_standard() convenience function

dandi/dandiapi.py

@@ -1071,6 +1071,20 @@ def iter_upload_raw_asset(
             self, metadata=asset_metadata, jobs=jobs, replacing=replace_asset
         )
 
+    def is_nwb(self) -> bool:
+        """
+        Returns True if the Dandiset contains one or more NWB file assets.
+
+        This is determined by checking for "RRID:SCR_015242" in the "dataStandard" field
+        of the assetsSummary of the dandiset.
+        """
+        assetsSummary = self.get_raw_metadata()["assetsSummary"]
+        if "dataStandard" not in assetsSummary:
+            return False
+        return any(
+            x["identifier"] == "RRID:SCR_015242" for x in assetsSummary["dataStandard"]
+        )
+
 
 class BaseRemoteAsset(ABC, APIBase):
     """