Change to TSRestApiV1.metadata_tml_import() per ThoughtSpot engineeri…

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = thoughtspot_rest_api_v1
-version = 1.6.1
+version = 1.7.0
 description = Library implementing the ThoughtSpot V1 REST API
 long_description = file: README.md
 long_description_content_type = text/markdown

src/thoughtspot_rest_api_v1/_version.py

@@ -1 +1 @@
-__version__ = '1.6.1'
+__version__ = '1.7.0'

src/thoughtspot_rest_api_v1/tsrestapiv1.py

@@ -1073,6 +1073,8 @@ def metadata_tml_export_string_with_associations_map(self, guid: str, formattype
         return response_str, name_guid_map
 
     # TML import is distinguished by having an {'Accept': 'text/plain'} header on the POST
+    # 'JSON' default actually takes a Python object representing JSON output
+    # Use 'YAML' or 'JSON_STR' as formattype if you have already stringified the input (read from disk etc.)
     def metadata_tml_import(
         self,
         tml: Union[Dict, List[Dict]],
@@ -1090,22 +1092,28 @@ def metadata_tml_import(
             tml_list = [tml]
         else:
             tml_list = tml
+        encoded_tmls = []
 
+        # Assume JSON is Python object
         if formattype == 'JSON':
-            json_encoded_tml = json.dumps(tml_list)
-        elif formattype == 'YAML':
-            json_encoded_tml = json.dumps(tml_list)
+            for t in tml_list:
+                encoded_tmls.append(json.dumps(t))
+        # YAML or JSON_STR are already string when sent in
+        elif formattype in ['YAML', 'JSON_STR']:
+            for t in tml_list:
+                encoded_tmls.append(t)
         # Assume it's just a Python object which will dump to JSON matching the TML format
         else:
-            json_encoded_tml = json.dumps(tml_list)
+            for t in tml_list:
+                encoded_tmls.append(json.dumps(t))
 
         import_policy = 'ALL_OR_NONE'
 
         if validate_only is True:
             import_policy = 'VALIDATE_ONLY'
 
         post_data = {
-            'import_objects': json_encoded_tml,
+            'import_objects': str(encoded_tmls),
             'import_policy': import_policy,
             'force_create': str(create_new_on_server).lower()
         }