refact

pina/condition/condition_interface.py

@@ -0,0 +1,15 @@
+
+from abc import ABCMeta, abstractmethod
+
+
+class ConditionInterface(metaclass=ABCMeta):
+
+    @abstractmethod
+    def residual(self, model):
+        """
+        Compute the residual of the condition.
+
+        :param model: The model to evaluate the condition.
+        :return: The residual of the condition.
+        """
+        pass