InigoSJ commented on a change in pull request #11943:
URL: https://github.com/apache/beam/pull/11943#discussion_r439505838
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File path: sdks/python/apache_beam/transforms/combiners.py
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@@ -66,8 +66,21 @@ class Mean(object):
"""Combiners for computing arithmetic means of elements."""
class Globally(ptransform.PTransform):
"""combiners.Mean.Globally computes the arithmetic mean of the elements."""
+ def __init__(self, has_defaults=True, *args, **kwargs):
+ super(Mean.Globally, self).__init__()
+ self.has_defaults = has_defaults
+ self.args = args
+ self.kwargs = kwargs
+
def expand(self, pcoll):
- return pcoll | core.CombineGlobally(MeanCombineFn())
+ if self.has_defaults:
+ return pcoll | core.CombineGlobally(MeanCombineFn())
+ else:
+ return pcoll | core.CombineGlobally(MeanCombineFn()).without_defaults()
+
+ def without_defaults(self):
+ self.has_defaults = False
Review comment:
Thanks for the suggestions.
I made it look more like the original `without_defaults()` from
[`CombineGlobally`](https://github.com/apache/beam/blob/master/sdks/python/apache_beam/transforms/core.py#L1834)
using both:
- `with_defaults`: actually making the request to compute `Mean`
- `without_defaults`: pointing to `with_defaults`
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