optimize: 语法优化。

Author: wangliang181230

apps/application/flow/step_node/variable_splitting_node/impl/base_variable_splitting_node.py

@@ -41,7 +41,7 @@ def save_context(self, details, workflow_manage):
         self.context['exception_message'] = details.get('err_message')
 
     def execute(self, input_variable, variable_list, **kwargs) -> NodeResult:
-        if type(input_variable).__name__ == "str":
+        if isinstance(input_variable, str):
             try:
                 input_variable = json.loads(input_variable)
             except Exception: