jroof88 commented on a change in pull request #29720:
URL: https://github.com/apache/spark/pull/29720#discussion_r489549168
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File path: python/pyspark/sql/types.py
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@@ -305,7 +305,7 @@ def jsonValue(self):
@classmethod
def fromJson(cls, json):
Review comment:
> The JSON format itself isn't supposed to be manually constructed
I see where you're coming from here but the function `.fromJson` for for
`ArrayType`, `MapType`, `StructField`, and `StructType` is exposed to
developers so it _can_ be used. I have a strong hunch people do use it as it is
an easy way to generate and store schemas. I'm curious what it would take to
get this through? It's _seems_ like a fairly logical change to make the
interface for these types more flexible. There is no user facing changes as it
only creates a default value when the key does not exist.
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