[docs] artifacts example: open file in wb mode

Gauvain Pocentek · Gauvain Pocentek · commit 35c6bbb9dfaa · 2016-12-24T14:39:10.000+01:00
Fixes #194
diff --git a/docs/gl_objects/builds.py b/docs/gl_objects/builds.py
@@ -80,7 +80,7 @@
 # stream artifacts
 class Foo(object):
     def __init__(self):
-        self._fd = open('artifacts.zip', 'w')
+        self._fd = open('artifacts.zip', 'wb')
 
     def __call__(self, chunk):
         self._fd.write(chunk)
