Disallow a default value of None

None is not a valid value for any setting type, and it can't
be dumped or expressed in config files at all.

1 files changed, 2 insertions, 0 deletions

diff --git a/example.py b/example.py
index 7e2a4a7..c86aaea 100644
--- a/example.py
+++ b/example.py
@@ -39,6 +39,8 @@ class ExampleApp(cliapp.Application):
                               group='Test Group')
 
         self.settings.string(['yoyo'], 'yoyo', group=cliapp.config_group_name)
+        
+        self.settings.string(['nono'], 'nono', default=None)
 
     # We override process_inputs to be able to do something after the last
     # input line.