serialize dict to a JSON formated string.

mdrsclient/commands/file_metadata.py

@@ -1,3 +1,4 @@
+import json
 import os
 from argparse import Namespace, _SubParsersAction
 
@@ -28,4 +29,4 @@ class FileMetadataCommand(BaseCommand):
             raise IllegalArgumentException(f"File `{r_basename}` not found.")
         file_api = FileApi(connection)
         metadata = file_api.metadata(file)
-        print(metadata)
+        print(json.dumps(metadata))