diff --git a/google/generativeai/types/generation_types.py b/google/generativeai/types/generation_types.py
index d4bed8b86..d82610ed0 100644
--- a/google/generativeai/types/generation_types.py
+++ b/google/generativeai/types/generation_types.py
@@ -440,10 +440,10 @@ def text(self):
 
         texts = []
         for part in parts:
-            if "text" in part:
+            if hasattr(part, "text"):
                 texts.append(part.text)
                 continue
-            if "executable_code" in part:
+            if hasattr(part, "executable_code"):
                 language = part.executable_code.language.name.lower()
                 if language == "language_unspecified":
                     language = ""
@@ -451,7 +451,7 @@ def text(self):
                     language = f" {language}"
                 texts.extend([f"```{language}", part.executable_code.code.lstrip("\n"), "```"])
                 continue
-            if "code_execution_result" in part:
+            if hasattr(part, "code_execution_result"):
                 outcome_result = part.code_execution_result.outcome.name.lower().replace(
                     "outcome_", ""
                 )