make FS URL with no protocol equivlenet to default opener

willmcgugan · willmcgugan · commit 61c22fd77378 · 2017-08-22T16:39:54.000+01:00
diff --git a/fs/opener/registry.py b/fs/opener/registry.py
@@ -123,6 +123,7 @@ def get_opener(self, protocol):
             successfully.
 
         """
+        protocol = protocol or self.default_opener
         entry_point = next(
             pkg_resources.iter_entry_points('fs.opener', protocol),
             None
