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https://issues.apache.org/jira/browse/SPARK-32933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17201017#comment-17201017
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Maciej Szymkiewicz commented on SPARK-32933:
--------------------------------------------
Not a problem [~hyukjin.kwon]. My only concern is that we still need a viable
alternative for capturing arguments. {{locals}} hack does the job, especially
if we add some helper for dropping {{self}}
{code:python}
def _drop_self(d):
d = copy.copy(d)
del d["self"]
return d
class BucketedRandomProjectionLSH(_LSH, _BucketedRandomProjectionLSHParams,
HasSeed, JavaMLReadable, JavaMLWritable):
def __init__(self, *, inputCol=None, outputCol=None, seed=None,
numHashTables=1,
bucketLength=None):
kwargs = _drop_self(locals())
...
{code}
Alternatively, we could just provide all the args explicitly.
I guess we could also leverage `inspect` (optionally combined with class
decorator? Just thinking out loud).
> Use keyword-only syntax for keyword_only methods
> ------------------------------------------------
>
> Key: SPARK-32933
> URL: https://issues.apache.org/jira/browse/SPARK-32933
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 3.1.0
> Reporter: Maciej Szymkiewicz
> Assignee: Maciej Szymkiewicz
> Priority: Minor
> Fix For: 3.1.0
>
>
> Since 3.0, provides syntax for indicating keyword-only arguments ([PEP
> 3102|https://www.python.org/dev/peps/pep-3102/]).
> It is not a full replacement for our current usage of {{keyword_only}}, but
> it would allow us to make our expectations explicit:
> {code:python}
> @keyword_only
> def __init__(self, degree=2, inputCol=None, outputCol=None):
> {code}
> {code:python}
> @keyword_only
> def __init__(self, *, degree=2, inputCol=None, outputCol=None):
> {code}
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