Index: Lib/urllib/parse.py
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- Lib/urllib/parse.py	(revision e325608740bee161ca7fefd09463d63099efa1b8)
+++ Lib/urllib/parse.py	(date 1516302439000)
@@ -606,6 +606,8 @@
 
     unquote('abc%20def') -> 'abc def'.
     """
+    if isinstance(string, bytes):
+        return unquote_to_bytes(string).decode(encoding, errors)
     if '%' not in string:
         string.split
         return string