Update app.py

app.py

@@ -12,6 +12,7 @@ from zipfile import ZipFile
 import pathlib
 import shutil
 import pandas as pd
+import json
 import deepsparse
 
 rn50_embedding_pipeline = deepsparse.Pipeline.create(
@@ -38,7 +39,7 @@ def zip_ims(g):
 def unzip_ims(zip_file_name):
     print("call file")
     if zip_file_name is None:
-        return {}
+        return json.dumps({})
     unzip_path = "img_dir"
     if os.path.exists(unzip_path):
         shutil.rmtree(unzip_path)
@@ -52,25 +53,25 @@ def unzip_ims(zip_file_name):
     embeddings = rn50_embedding_pipeline(images=im_name_l)
     if os.path.exists(unzip_path):
         shutil.rmtree(unzip_path)
-    return {
+    return json.dumps({
         "names": im_name_l,
         "embs": embeddings.embeddings
-    }
+    })
 
 
 def emb_img_func(im):
     print("call im :")
     if im is None:
-        return {}
+        return json.dumps({})
     im_obj = Image.fromarray(im)
     im_name = "{}.png".format(uuid1())
     im_obj.save(im_name)
     embeddings = rn50_embedding_pipeline(images=[im_name])
     os.remove(im_name)
-    return {
+    return json.dumps({
         "names": [im_name],
         "embs": embeddings.embeddings
-    }
+    })
 
 '''
 def emb_gallery_func(gallery):