updated adding instance_format to variable query

CHANGELOG.md

@@ -19,6 +19,7 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 - Support multi-point searches ([#72](https://github.com/nasa/python_cmr/issues/72))
 - Support `processing_level_id` in `CollectionQuery` ([#76](https://github.com/nasa/python_cmr/issues/76))
 - Support `platform` in `CollectionQuery` ([#77](https://github.com/nasa/python_cmr/issues/77))
+- Support `instance-format` to `VariableQuery` to allow for searching of variable zarr stores ([#59]https://github.com/nasa/python_cmr/issues/59)
 
 ### Fixed
 - Setup vcrpy for new `revision_date` unit tests ([#70](https://github.com/nasa/python_cmr/issues/70))

cmr/queries.py

@@ -1210,6 +1210,19 @@ def __init__(self, mode: str = CMR_OPS):
             "dif", "dif10", "opendata", "umm_json", "umm_json_v[0-9]_[0-9]"
         ])
 
+    def instance_format(self, instance_format: str) -> Self:
+        """
+        Filter by instance format.
+
+        :param instance_format: format for variable instance
+        :returns: self
+        """
+
+        if instance_format: 
+            self.params['instance_format'] = instance_format 
+
+        return self
+
     @override
     def _valid_state(self) -> bool:
         return True

tests/test_variable.py

@@ -85,3 +85,10 @@ def bearer_test_token(self):
 
         self.assertIn("Authorization", query.headers)
         self.assertEqual(query.headers["Authorization"], "Bearer 123TOKEN")
+
+    def test_instance_format(self):
+        query = VariableQuery()
+        query.instance_format("zarr")
+
+        self.assertIn("instance_format", query.params)
+        self.assertEqual(query.params["instance_format"], "zarr")