more.py: document ilen

Signed-off-by: zhang-liang-pengkun <zhangliangpengkun@xfusion.com>

0002-more.py-document-ilen.patch

@@ -0,0 +1,29 @@
+From fc39d84358199cd0fc7a33e9179244a4987e36c7 Mon Sep 17 00:00:00 2001
+From: Ben Mintz <bmintz@protonmail.com>
+Date: Mon, 7 May 2018 03:29:41 -0500
+Subject: [PATCH] more.py: document ilen
+
+I found the implementation of ilen to be confusing, so I documented it.
+---
+ more_itertools/more.py | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/more_itertools/more.py b/more_itertools/more.py
+index 6de5b03..a5fd960 100644
+--- a/more_itertools/more.py
++++ b/more_itertools/more.py
+@@ -409,7 +409,11 @@ def ilen(iterable):
+     This consumes the iterable, so handle with care.
+ 
+     """
++    # maxlen=1 only stores the last item in the deque
+     d = deque(enumerate(iterable, 1), maxlen=1)
++    # since we started enumerate at 1,
++    # the first item of the last pair will be the length of the iterable
++    # (assuming there were items)
+     return d[0][0] if d else 0
+ 
+ 
+-- 
+2.39.0.windows.2
+

python-more-itertools.spec

@@ -8,6 +8,7 @@ Source0:        https://pypi.io/packages/source/m/more-itertools/more-itertools-
 BuildArch:      noarch
 Patch0000:      python37.patch
 Patch0001:      0001-fix-for-python-3.7-deprecation-warning-about-importi.patch
+Patch0002:      0002-more.py-document-ilen.patch
 
 %description
 This is a python library for efficient use of itertools utility, which also \
@@ -62,6 +63,9 @@ See https://pythonhosted.org/more-itertools/index.html for more information.
 %{python3_sitelib}/more_itertools-%{version}-py%{python3_version}.egg-info
 
 %changelog
+* Fri Nov 24 2023 zhangliangpengkun<zhangliangpengkun@xfusion.com> - 
+- more.py: document ilen
+
 * Thu Nov 16 2023 zhangliangpengkun<zhangliangpengkun@xfusion.com> - 4.1.0-6
 - fix for python 3.7 deprecation warning about importing certain types from collections vs collections.abc