Remove value from the Image repr

ipywidgets/widgets/widget_image.py

@@ -6,6 +6,7 @@
 Represents an image in the frontend using a widget.
 """
 import mimetypes
+import hashlib
 
 from .widget_core import CoreWidget
 from .domwidget import DOMWidget
@@ -128,3 +129,27 @@ def _guess_format(cls, filename):
             return mtype[len('image/'):]
         except Exception:
             return None
+
+    def __repr__(self):
+        # Truncate the value in the repr, since it will
+        # typically be very, very large.
+
+        def hash_string(s):
+            return hashlib.md5(s.encode("utf8")).hexdigest()
+
+        class_name = self.__class__.__name__
+
+        # Return value first like a ValueWidget
+        signature = []
+        sig_value = str(self.value)
+        if len(str(self.value)) > 100:
+            sig_value = '<base64, hash={}...>'.format(hash_string(sig_value)[:16])
+        signature.append('%s=%r' % ('value', sig_value))
+
+        for key in super(Image, self)._repr_keys():
+            if key == 'value':
+                continue
+            value = str(getattr(self, key))
+            signature.append('%s=%r' % (key, value))
+        signature = ', '.join(signature)
+        return '%s(%s)' % (class_name, signature)