From a8f0226c8beec6b4d9dc9714c338404da53d7006 Mon Sep 17 00:00:00 2001
From: Julien Palard <julien@palard.fr>
Date: Fri, 1 Dec 2023 13:52:28 +0100
Subject: [PATCH] Implement batched from an idea of @YashAgarwal in #85.

---
 README.md      | 11 +++++++++++
 pipe.py        |  7 +++++++
 pyproject.toml |  2 +-
 tox.ini        |  2 +-
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 919a6bb..21954c0 100644
--- a/README.md
+++ b/README.md
@@ -294,6 +294,17 @@ See the `Constructing your own` paragraph below.
 
 Alphabetical list of available pipes; when several names are listed for a given pipe, these are aliases.
 
+## `batched`
+
+Like Python 3.12 `itertool.batched`:
+
+```python
+>>> from pipe import batched
+>>> list("ABCDEFG" | batched(3))
+[('A', 'B', 'C'), ('D', 'E', 'F'), ('G',)]
+
+```
+
 ## `chain`
 
 Chain a sequence of iterables:
diff --git a/pipe.py b/pipe.py
index f6d24ef..0990eb7 100644
--- a/pipe.py
+++ b/pipe.py
@@ -200,6 +200,13 @@ def transpose(iterable):
     return list(zip(*iterable))
 
 
+@Pipe
+def batched(iterable, n):
+    iterator = iter(iterable)
+    while batch := tuple(itertools.islice(iterator, n)):
+        yield batch
+
+
 chain = Pipe(itertools.chain.from_iterable)
 chain_with = Pipe(itertools.chain)
 islice = Pipe(itertools.islice)
diff --git a/pyproject.toml b/pyproject.toml
index cee4106..6728b4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
     "Topic :: Software Development",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-requires-python = ">= 3.7"
+requires-python = ">= 3.8"
 
 [project.urls]
 repository = "https://github.com/JulienPalard/Pipe"
diff --git a/tox.ini b/tox.ini
index daf7074..ecdc3b6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ exclude_lines =
   if __name__ == .__main__.:
 
 [tox]
-envlist = py3{8,9,10,11,12}, flake8, mypy, black, pylint, coverage
+envlist = py3{8,9,10,11,12,13}, flake8, mypy, black, pylint, coverage
 isolated_build = True
 
 [testenv]