Email: fix handling templates_path default value

mylib/config.py

@@ -1156,6 +1156,16 @@ class ConfigurableObject:
 
         return default if default is not None else self._defaults.get(option)
 
+    def set_default(self, option, default_value):
+        """Set option default value"""
+        assert option in self._defaults, f"Unkown option {option}"
+        self._defaults[option] = default_value
+
+    def set_defaults(self, **default_values):
+        """Set options default value"""
+        for option, default_value in default_values.items():
+            self.set_default(option, default_value)
+
     def configure(self, comment=None, **kwargs):
         """Configure options on registered mylib.Config object"""
         assert self._config, (

mylib/email.py

@@ -143,6 +143,7 @@ class EmailClient(
         section.add_option(
             StringOption,
             "templates_path",
+            default=self._defaults["templates_path"],
             comment="Path to templates directory",
         )
 

mylib/scripts/email_test_with_config.py

@@ -18,12 +18,11 @@ def main(argv=None):  # pylint: disable=too-many-locals,too-many-statements
     config = Config(__doc__, __name__.replace(".", "_"))
 
     email_client = EmailClient(config=config)
-    email_client.configure()
+    email_client.set_default(
-    config.set_default(
-        "email",
         "templates_path",
         os.path.join(os.path.dirname(os.path.realpath(__file__)), "email_templates"),
     )
+    email_client.configure()
 
     # Options parser
     parser = config.get_arguments_parser(description=__doc__)