[GitHub] [beam] udim commented on a change in pull request #11038: [BEAM-7746] More typing fixes

[GitBox <gi...@apache.org>]

udim commented on a change in pull request #11038: [BEAM-7746] More typing fixes
URL: https://github.com/apache/beam/pull/11038#discussion_r405835011
 
 

 ##########
 File path: sdks/python/apache_beam/coders/coders.py
 ##########
 @@ -387,8 +387,11 @@ def register_structured_urn(urn, cls):
     """Register a coder that's completely defined by its urn and its
     component(s), if any, which are passed to construct the instance.
     """
-    cls.to_runner_api_parameter = (
-        lambda self, unused_context: (urn, None, self._get_component_coders()))
+    setattr(
 
 Review comment:
   I guess set/getattr is cleaner. If this becomes commonplace in the codebase then perhaps we don't need the comment (and mypy will give an error if you attempt to use regular assignment).
   
   ref: https://github.com/python/mypy/issues/2427#issuecomment-259677994 (though I don't fully get the examples)

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