remove global functions

src/models.py

@@ -89,6 +89,23 @@ class DarcKey(BaseModel):
             key_type=self.key_type
         )
 
+    def __eq__(self, other) -> bool:
+        if self.key_type != other.key_type:
+            return False
+
+        if len(self.matrix) != len(other.matrix):
+            return False
+
+        if len(self.matrix[0]) != len(other.matrix[0]):
+            return False
+
+        for i in range(len(self.matrix)):
+            for j in range(len(self.matrix[0])):
+                if self.matrix[i][j] != other.matrix[i][j]:
+                    return False
+
+        return True
+
     def column_substitution(self, column: int, substitution: list[int]):
         assert len(substitution) == len(self.matrix)
         assert len(self.matrix[0]) > column >= 0