fix: fix pydantic object copy

Author: goasleep

scrapegraphai/utils/copy.py

@@ -10,8 +10,8 @@ def safe_deepcopy(obj: Any) -> Any:
     """
     Attempts to create a deep copy of the object using `copy.deepcopy`
     whenever possible. If that fails, it falls back to custom deep copy
-    logic or returns the original object.
-
+    logic. If that also fails, it raises a `DeepCopyError`.
+    
     Args:
         obj (Any): The object to be copied, which can be of any type.
 
@@ -26,13 +26,7 @@ def safe_deepcopy(obj: Any) -> Any:
     try:
 
         # Try to use copy.deepcopy first
-        if isinstance(obj,BaseModel):
-            # handle BaseModel because __fields_set__ need  compatibility 
-            copied_obj = obj.copy(deep=True)
-        else:
-            copied_obj = copy.deepcopy(obj)
-
-        return copied_obj
+        return copy.deepcopy(obj)
     except (TypeError, AttributeError) as e:
         # If deepcopy fails, handle specific types manually
 
@@ -65,14 +59,17 @@ def safe_deepcopy(obj: Any) -> Any:
 
         # Handle objects with attributes
         elif hasattr(obj, "__dict__"):
-            new_obj = obj.__new__(obj.__class__)
-            for attr in obj.__dict__:
-                setattr(new_obj, attr, safe_deepcopy(getattr(obj, attr)))
-            
-            return new_obj
-        
+            # If an object cannot be deep copied, then the sub-properties of \
+            # the object will not be analyzed and shallow copy will be used directly.
+            try:
+                return copy.copy(obj)
+            except (TypeError, AttributeError):
+                raise DeepCopyError(f"Cannot deep copy the object of type {type(obj)}") from e
+
+
         # Attempt shallow copy as a fallback
         try:
             return copy.copy(obj)
         except (TypeError, AttributeError):
             raise DeepCopyError(f"Cannot deep copy the object of type {type(obj)}") from e
+            

tests/utils/copy_utils_test.py

@@ -4,14 +4,10 @@
 # Assuming the custom_deepcopy function is imported or defined above this line
 from scrapegraphai.utils.copy import DeepCopyError, safe_deepcopy
 from pydantic.v1 import BaseModel
-from pydantic import BaseModel as BaseModelV2
 
 class PydantObject(BaseModel):
     value: int
 
-class PydantObjectV2(BaseModelV2):
-    value: int
-
 class NormalObject:
     def __init__(self, value):
         self.value = value
@@ -162,16 +158,16 @@ def test_client():
     llm_instance_config = {
         "model": "moonshot-v1-8k",
         "base_url": "https://api.moonshot.cn/v1",
-        "moonshot_api_key": "sk-OWo8hbSubp1QzOPyskOEwXQtZ867Ph0PZWCQdWrc3PH4o0lI",
+        "moonshot_api_key": "xxx",
     }
 
     from langchain_community.chat_models.moonshot import MoonshotChat
 
     llm_model_instance = MoonshotChat(**llm_instance_config)
-    
     copy_obj = safe_deepcopy(llm_model_instance)
+    
     assert copy_obj
-
+    assert hasattr(copy_obj, 'callbacks')
 
 def test_circular_reference_in_dict():
     original = {}
@@ -182,3 +178,9 @@ def test_circular_reference_in_dict():
     assert copy_obj is not original
     # Check that the circular reference is maintained in the copy
     assert copy_obj['self'] is copy_obj
+
+def test_with_pydantic():
+    original = PydantObject(value=1)
+    copy_obj = safe_deepcopy(original)
+    assert copy_obj.value == original.value
+    assert copy_obj is not original