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authorFrederick Muriuki Muriithi2021-10-25 19:12:24 +0300
committerFrederick Muriuki Muriithi2021-10-25 19:12:24 +0300
commit783f302c5d4729eb0b5fb6ba79180b7cd97764a5 (patch)
treea36567f82d76c3013bbb6021fa6d08eb09500201 /gn3/data_helpers.py
parent5a472ebab04c68cd5228f253cc98d0ae22a520d7 (diff)
downloadgenenetwork3-783f302c5d4729eb0b5fb6ba79180b7cd97764a5.tar.gz
Implement `partition_all` function
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/partial-correlations.gmi * gn3/data_helpers.py: new function (partition_all) * tests/unit/test_data_helpers.py: tests for function `gn3.data_helpers.partition_all` As part of migrating some functions that access the database, this commit extracts generic processes that can be accomplished on data, and implements the `partition_all` function, that is equivalent to Clojure's `partition-all` function.
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diff --git a/gn3/data_helpers.py b/gn3/data_helpers.py
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+"""
+This module will hold generic functions that can operate on a wide-array of
+data structures.
+"""
+
+from math import ceil
+from functools import reduce
+from typing import Any, Tuple, Sequence
+
+def partition_all(num: int, items: Sequence[Any]) -> Tuple[Tuple[Any, ...], ...]:
+ """
+ Given a sequence `items`, return a new sequence of the same type as `items`
+ with the data partitioned into sections of `n` items per partition.
+
+ This is an approximation of clojure's `partition-all` function.
+ """
+ def __compute_start_stop__(acc, iteration):
+ start = iteration * num
+ return acc + ((start, start + num),)
+
+ iterations = range(ceil(len(items) / num))
+ return tuple([# type: ignore[misc]
+ tuple(items[start:stop]) for start, stop # type: ignore[has-type]
+ in reduce(
+ __compute_start_stop__, iterations, tuple())])