TheNeuralBit commented on a change in pull request #15078:
URL: https://github.com/apache/beam/pull/15078#discussion_r658985643
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File path: sdks/python/apache_beam/dataframe/frames.py
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@@ -869,6 +869,67 @@ def mask(self, cond, **kwargs):
"""mask is not parallelizable when ``errors="ignore"`` is specified."""
return self.where(~cond, **kwargs)
+ @frame_base.with_docs_from(pd.DataFrame)
+ @frame_base.args_to_kwargs(pd.DataFrame)
+ @frame_base.populate_defaults(pd.DataFrame)
+ def xs(self, key, axis, level, **kwargs):
+ """Note that ``xs(axis='index')`` will raise a ``KeyError`` at execution
+ time if the key does not exist in the index."""
+
+ if axis in ('columns', 1):
+ return frame_base.DeferredFrame.wrap(
+ expressions.ComputedExpression(
+ 'xs',
+ lambda df: df.xs(key, axis=axis, **kwargs), [self._expr],
+ requires_partition_by=partitionings.Arbitrary(),
+ preserves_partition_by=partitionings.Arbitrary()))
+ elif axis not in ('index', 0):
+ raise ValueError(
Review comment:
Done
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