feat: 改进缓存管理器

src/heurams/kernel/particles/nucleon.py

@@ -29,7 +29,40 @@ class Nucleon:
 
     def __hash__(self):
         return hash(self.ident)
-
+    
+    def do_eval(self):
+        """
+        执行并以结果替换当前单元的所有 eval 语句
+        TODO: 带有限制的 eval, 异步/多线程执行避免堵塞
+        """
+        # eval 环境设置
+        def eval_with_env(s: str):
+            try:
+                nucleon = self
+                ret = str(eval(s))
+            except Exception as e:
+                ret = f"此 eval 实例发生错误: {e}"
+            return ret
+            
+        def traverse(data, modifier):
+            if isinstance(data, dict):
+                for key, value in data.items():
+                    data[key] = traverse(value, modifier)
+                return data
+            elif isinstance(data, list):
+                for i, item in enumerate(data):
+                    data[i] = traverse(item, modifier)
+                return data
+            elif isinstance(data, tuple):
+                return tuple(traverse(item, modifier) for item in data)
+            else:
+                if isinstance(data, str):
+                    if data.startswith("eval:"):
+                        return modifier(data[5:])
+                return data
+        
+        traverse(self.payload, eval_with_env)
+        traverse(self.metadata, eval_with_env)
     @staticmethod
     def placeholder():
         """生成一个占位原子核"""