Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/19459#discussion_r144750372 --- Diff: python/pyspark/sql/dataframe.py --- @@ -70,12 +70,12 @@ class DataFrame(object): .. versionadded:: 1.3 """ - def __init__(self, jdf, sql_ctx): + def __init__(self, jdf, sql_ctx, schema=None): self._jdf = jdf self.sql_ctx = sql_ctx self._sc = sql_ctx and sql_ctx._sc self.is_cached = False - self._schema = None # initialized lazily + self._schema = schema # initialized lazily if None --- End diff -- @BryanCutler, what do you think about taking this out back? Maybe, I am too much worried but I think we maybe should avoid it to be assigned actually except for few special cases ...
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