add save function in pipeline

tensorneat/utils/stateful_class.py

@@ -1,3 +1,4 @@
+import json
 from typing import Optional
 from . import State
 import pickle
@@ -18,6 +19,15 @@ class StatefulBaseClass:
         with open(path, "wb") as f:
             pickle.dump(self, f)
 
+    def show_config(self):
+        config = {}
+        for key, value in self.__dict__.items():
+            if isinstance(value, StatefulBaseClass):
+                config[str(key)] = value.show_config()
+            else:
+                config[str(key)] = str(value)
+        return config
+
     @classmethod
     def load(cls, path: str, with_state: bool = False, warning: bool = True):
         with open(path, "rb") as f: