AnandInguva commented on code in PR #29564:
URL: https://github.com/apache/beam/pull/29564#discussion_r1414351708
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sdks/python/apache_beam/ml/transforms/base.py:
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@@ -42,12 +64,68 @@
OperationOutputT = TypeVar('OperationOutputT')
+def _convert_list_of_dicts_to_dict_of_lists(
+ list_of_dicts: Sequence[Dict[str, Any]]) -> Dict[str, List[Any]]:
+ keys_to_element_list = collections.defaultdict(list)
+ for d in list_of_dicts:
+ for key, value in d.items():
+ keys_to_element_list[key].append(value)
+ return keys_to_element_list
+
+
+def _convert_dict_of_lists_to_lists_of_dict(
+ dict_of_lists: Dict[str, List[Any]],
+ batch_length: int) -> List[Dict[str, Any]]:
+ result: List[Dict[str, Any]] = [{} for _ in range(batch_length)]
+ for key, values in dict_of_lists.items():
+ for i in range(len(values)):
+ result[i][key] = values[i]
Review Comment:
Removed batch_length input param. Added an assertion as well.
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