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gh-106318: Add example for str.index() #137023

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3253a52
gh-106320: Remove private _PyInterpreterState functions (#106335)
vstinner Jul 2, 2023
fee3f11
Doc: minor change
adorilson Dec 30, 2023
ed4cc6f
Revert "Doc: minor change"
adorilson Mar 25, 2024
e3c43bb
gh-106318: Add example for str.index()
adorilson Jul 22, 2025
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13 changes: 12 additions & 1 deletion Doc/library/stdtypes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1970,7 +1970,18 @@ expression support in the :mod:`re` module).
.. method:: str.index(sub[, start[, end]])

Like :meth:`~str.find`, but raise :exc:`ValueError` when the substring is
not found.
not found. For example:

.. doctest::

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

See also :meth:`rindex`.


.. method:: str.isalnum()
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