more informative exception

aio-libs · Nov 13, 2013 · e563333 · e563333
1 parent 0f5c26a
commit e563333
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/aiohttp/client.py b/aiohttp/client.py
@@ -636,7 +636,8 @@ def write_bytes(self, request, is_stream):
                     request.write(result)
                     value = None
                 else:
-                    raise ValueError('Bytes object is expected.')
+                    raise ValueError(
+                        'Bytes object is expected, got: %s.' % type(result))
         else:
             if isinstance(self.body, bytes):
                 self.body = (self.body,)