Update utils.py

utils.py

@@ -45,7 +45,7 @@ class strLabelConverter(object):
                 for char in text
             ]
             length = [len(text)]
-        elif isinstance(text, collections.Iterable):
+        else:
             length = [len(s) for s in text]
             text = ''.join(text)
             text, _ = self.encode(text)