fix error when parameters do not exist

README.md

@@ -15,7 +15,7 @@ license: wtfpl
 This is Gradio project for reading and displaying an image and its metadata from url.
 
 ## Usage
-- Copy image link;
+- Copy image address;
 - Paste it into the **url** field
 - Submit
 

app.py

@@ -14,7 +14,11 @@ def display_image_from_url(url):
     image = Image.open(res)
     image.load()
 
-    return image, image.info['parameters'], image.info
+    parameters = "Parameters have been erased from this image"
+    if 'parameters' in image.info:
+        parameters = image.info['parameters']
+
+    return image, parameters, image.info
 
 server = gr.Interface(display_image_from_url, "text", ["image", gr.Textbox(label="Generation Parameters"), gr.Textbox(label="Metadata")])
 server.launch()