refactor: avoid using temp files in sandbox.

Author: liqiang-fit2cloud

apps/common/utils/tool_code.py

@@ -100,7 +100,7 @@ def exec_code(self, code_str, keywords):
         result_line = [line for line in lines if line.startswith(_id)]
         if not result_line:
             raise Exception("No result found.")
-        result = json.loads(base64.b64decode(result_line[0].split(":", 1)[1]).decode())
+        result = json.loads(base64.b64decode(result_line[-1].split(":", 1)[1]).decode())
         if result.get('code') == 200:
             return result.get('data')
         raise Exception(result.get('msg'))