zero323 commented on a change in pull request #29122:
URL: https://github.com/apache/spark/pull/29122#discussion_r458287046
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File path: python/pyspark/sql/functions.py
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@@ -2392,7 +2393,7 @@ def json_tuple(col, *fields):
@since(2.1)
-def from_json(col, schema, options={}):
+def from_json(col, schema, options: Dict = None):
Review comment:
> Personally, I don't see any harm in adding the types over time, and
work towards coverage,
The biggest problem is the resolution. As far as I am aware it is
all-or-nothing at the module level (assuming `partial` mode), so working over
time will likely degrade experience of the users that already use annotations.
And it seems somewhat unnecessary, considering that you could migrate stubs
into main repo with a single copy, if there was a will to maintain the result.
Inline variant would be trickier (and there is still concern of
https://bugs.python.org/issue39168).
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