Config: allow access/setting config options as with a dict

mylib/config.py

@@ -655,6 +655,11 @@ class Config:  # pylint: disable=too-many-instance-attributes
             return getattr(self.options, option)
         return default
 
+    def __getitem__(self, key):
+        assert self.config_parser or self.options, 'Unconfigured options parser'
+        assert key in self.sections, f'Unknown section {key}'
+        return ConfigSectionAsDictWrapper(self.sections[key])
+
     def set(self, section, option, value):
         """ Set option value """
         assert self.config_parser, 'Unconfigured options parser'
@@ -1088,3 +1093,24 @@ class ConfigurableObject:
         """ Configuration initialized hook """
         if loaded_config:
             self.config = loaded_config  # pylint: disable=attribute-defined-outside-init
+
+
+class ConfigSectionAsDictWrapper:
+    """
+    Wrapper for ConfigSection that offer __getitems__ and __setitem__ methods
+    to allow access to section options as with a dictionary.
+    """
+
+    __section = None
+
+    def __init__(self, section):
+        self.__section = section
+
+    def __getitem__(self, key):
+        return self.__section.get(key)
+
+    def __setitem__(self, key, value):
+        self.__section.set(key, value)
+
+    def __delitem__(self, key):
+        raise Exception('Deleting a configuration option is not supported')