udim commented on a change in pull request #15967:
URL: https://github.com/apache/beam/pull/15967#discussion_r749569196
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File path: sdks/python/apache_beam/typehints/typehints.py
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@@ -462,7 +462,7 @@ def match_type_variables(self, concrete_type):
return {self: concrete_type}
def bind_type_variables(self, bindings):
- return bindings.get(self, self)
+ return bindings.get(self, bindings.get('*', self))
Review comment:
Maybe add a comment explaining what the special key `'*'` means, i.e.,
that it will apply to all unbound type variables.
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