[Python-checkins] introduce omitted index default before using it (GH-27775) (GH-27803)
ambv
webhook-mailer at python.org
Tue Aug 17 17:50:02 EDT 2021
https://github.com/python/cpython/commit/1bc05419b8518da75b6ac8c13e27fa0079d5015f
commit: 1bc05419b8518da75b6ac8c13e27fa0079d5015f
branch: 3.9
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: ambv <lukasz at langa.pl>
date: 2021-08-17T23:49:53+02:00
summary:
introduce omitted index default before using it (GH-27775) (GH-27803)
(cherry picked from commit 599f5c8481ca258ca3a5d13eaee7d07a9103b5f2)
Co-authored-by: Jefferson Oliveira <jefferson.dev.insights at gmail.com>
files:
M Doc/tutorial/introduction.rst
diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
index 4613cf76c5309..8763626ef553b 100644
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -269,14 +269,6 @@ to obtain individual characters, *slicing* allows you to obtain substring::
>>> word[2:5] # characters from position 2 (included) to 5 (excluded)
'tho'
-Note how the start is always included, and the end always excluded. This
-makes sure that ``s[:i] + s[i:]`` is always equal to ``s``::
-
- >>> word[:2] + word[2:]
- 'Python'
- >>> word[:4] + word[4:]
- 'Python'
-
Slice indices have useful defaults; an omitted first index defaults to zero, an
omitted second index defaults to the size of the string being sliced. ::
@@ -287,6 +279,14 @@ omitted second index defaults to the size of the string being sliced. ::
>>> word[-2:] # characters from the second-last (included) to the end
'on'
+Note how the start is always included, and the end always excluded. This
+makes sure that ``s[:i] + s[i:]`` is always equal to ``s``::
+
+ >>> word[:2] + word[2:]
+ 'Python'
+ >>> word[:4] + word[4:]
+ 'Python'
+
One way to remember how slices work is to think of the indices as pointing
*between* characters, with the left edge of the first character numbered 0.
Then the right edge of the last character of a string of *n* characters has
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