fix vendor import for multipart (#2567)

* fix vendor import for multipart * add changelog
Azure · May 6, 2024 · 4d24be7 · 4d24be7
1 parent 9ec8c1f
commit 4d24be7
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diff --git a/.chronus/changes/fix-vendor-import-2024-4-6-15-24-24.md b/.chronus/changes/fix-vendor-import-2024-4-6-15-24-24.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@autorest/python"
+---
+
+Fix import for multipart/form-data in _vendor.py
diff --git a/packages/autorest.python/autorest/codegen/serializers/general_serializer.py b/packages/autorest.python/autorest/codegen/serializers/general_serializer.py
@@ -134,6 +134,7 @@ def serialize_vendor_file(self, clients: List[Client]) -> str:
         if (
             self.code_model.has_form_data
             and self.code_model.options["models_mode"] == "dpg"
+            and not self.async_mode
         ):
             file_import.add_submodule_import("typing", "IO", ImportType.STDLIB)
             file_import.add_submodule_import("typing", "Tuple", ImportType.STDLIB)