diff --git a/mylib/config.py b/mylib/config.py
index 00eabda..b8872fb 100644
--- a/mylib/config.py
+++ b/mylib/config.py
@@ -90,22 +90,28 @@ class BaseOption:
 
     def set(self, value):
         """ Set option value to config file """
-        assert self.config.config_parser, "Can set option value only if configuration file is configured"
+        assert self.config.config_parser or (self.config.options and not self.no_arg), (
+            "Can't set option value: configuration file not configured, not options (or no argument)")
         if value == '':
             value = None
 
-        if value == self.default or value is None:
-            # Remove option from config
-            self.config.config_parser.remove_option(
-                self.section.name, self.name)
-        else:
-            # Store option to config
-            if not self.config.config_parser.has_section(self.section.name):
-                self.config.config_parser.add_section(self.section.name)
+        if self.config.config_parser:
+            if value == self.default or value is None:
+                # Remove option from config (is section exists)
+                if self.config.config_parser.has_section(self.section.name):
+                    self.config.config_parser.remove_option(
+                        self.section.name, self.name)
+            else:
+                # Store option to config
+                if not self.config.config_parser.has_section(self.section.name):
+                    self.config.config_parser.add_section(self.section.name)
 
-            self.config.config_parser.set(
-                self.section.name, self.name, self.to_config(value)
-            )
+                self.config.config_parser.set(
+                    self.section.name, self.name, self.to_config(value)
+                )
+
+        if self.config.options and not self.no_arg:
+            setattr(self.config.options, self.parser_dest, value)
 
     @property
     def parser_action(self):