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gh-106318: Add example for str.rindex() method by adorilson · Pull Request #143887 · python/cpython · GitHub

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gh-106318: Add example for str.rindex() method #143887

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Merged
vstinner merged 5 commits into from
Feb 3, 2026
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gh-106318: Add example for str.rindex() method #143887

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gh-106318: Add example for str.rindex() method
adorilson Jan 15, 2026
140d99b
gh-106318: Add a successful example for str.rindex() method
adorilson Feb 2, 2026
08a4a43
gh-106318: Fix typo
adorilson Feb 2, 2026
df2492e
gh-106318: Add a successful example for str.index() method
adorilson Feb 2, 2026
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Merge branch 'main' into 106318.rindex
vstinner Feb 3, 2026
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16 changes: 16 additions & 0 deletions Doc/library/stdtypes.rst
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Expand Up @@ -2163,6 +2163,8 @@ expression support in the :mod:`re` module).

.. doctest::

>>> 'spam, spam, spam'.index('spam')
0
>>> 'spam, spam, spam'.index('eggs')
Traceback (most recent call last):
File "<python-input-0>", line 1, in <module>
Expand Down Expand Up @@ -2546,6 +2548,20 @@ expression support in the :mod:`re` module).

Like :meth:`rfind` but raises :exc:`ValueError` when the substring *sub* is not
found.
For example:

.. doctest::

>>> 'spam, spam, spam'.rindex('spam')
12
>>> 'spam, spam, spam'.rindex('eggs')

vstinner Jan 19, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Can you add a successful example, like looking for spam?

adorilson Jan 31, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Sure.

But I did it this way to be in line with str.index, which doesn't have a successful example.

Should I add it there as well?

vstinner Feb 2, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

But I did it this way to be in line with str.index, which doesn't have a successful example. Should I add it there as well?

Yes, I suggest to also add a successful example in str.index().

Try to use the same input string for both examples.

adorilson Feb 2, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Done here.

vstinner Feb 2, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

You didn't add a successful example to str.index().

adorilson Feb 2, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

It is a new PR: #144408

vstinner Feb 3, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

It doesn't deserve a whole new PR. Please change it in this PR.

adorilson Feb 3, 2026

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All done.
Traceback (most recent call last):
File "<stdin-0>", line 1, in <module>
'spam, spam, spam'.rindex('eggs')
~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
ValueError: substring not found

See also :meth:`index` and :meth:`find`.


.. method:: str.rjust(width, fillchar=' ', /)
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