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gh-137881: Add examples of explicit DBM backend selection in shelve module #138007

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gh-137881: Add examples of explicit DBM backend selection in shelve module #138007

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17 changes: 17 additions & 0 deletions Doc/library/shelve.rst
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Expand Up @@ -262,6 +262,23 @@ object)::

d.close() # close it

The :func:`shelve.open` function automatically selects an available DBM backend
implementation. You can explicitly select the DBM backend by using
:class:`shelve.Shelf` with a specific backend:

.. code-block:: python

import shelve
import dbm

# Use SQLite3 as DBM backend
with shelve.Shelf(dbm.sqlite3.open("data.shelf", "c")) as shelf:
shelf["int"] = 4

# Use GNU DBM as backend
with shelve.Shelf(dbm.gnu.open("data.gnu", "c")) as shelf:
shelf["foo"] = "bar"


Exceptions
----------
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