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lodel/plugin/interface.py

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+from .plugins import Plugin
+from .exceptions import *
+from lodel.settings.validator import SettingValidator
+
+class InterfacePlugin(Plugin):
+    
+    ##@brief Singleton instance storage
+    _instance = None
+
+    _plist_confspecs = {
+        'section': 'lodel2',
+        'key': 'interface',
+        'default': None,
+        'validator': SettingValidator('strip', none_is_valid = True)}
+    
+    def __init__(self, name):
+        if InterfacePlugin._instance is not None:
+            raise PluginError("Maximum one interface allowed")
+        super().__init__(name)
+        self._instance = self