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[3.12] gh-111726: Explicitly close database connections in sqlite3 doctests (GH-111730) by miss-islington · Pull Request #117630 · python/cpython · GitHub

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[3.12] gh-111726: Explicitly close database connections in sqlite3 doctests (GH-111730) #117630

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erlend-aasland merged 1 commit into from
Apr 8, 2024
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[3.12] gh-111726: Explicitly close database connections in sqlite3 doctests (GH-111730) #117630

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27 changes: 27 additions & 0 deletions Doc/library/sqlite3.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@
src = sqlite3.connect(":memory:", isolation_level=None)
dst = sqlite3.connect("tutorial.db", isolation_level=None)
src.backup(dst)
src.close()
dst.close()
del src, dst

.. _sqlite3-intro:
Expand Down Expand Up @@ -220,6 +222,7 @@ creating a new cursor, then querying the database:
>>> title, year = res.fetchone()
>>> print(f'The highest scoring Monty Python movie is {title!r}, released in {year}')
The highest scoring Monty Python movie is 'Monty Python and the Holy Grail', released in 1975
>>> new_con.close()

You've now created an SQLite database using the :mod:`!sqlite3` module,
inserted data and retrieved values from it in multiple ways.
Expand Down Expand Up @@ -735,6 +738,7 @@ Connection objects
>>> for row in con.execute("SELECT md5(?)", (b"foo",)):
... print(row)
('acbd18db4cc2f85cedef654fccc4a4d8',)
>>> con.close()


.. method:: create_aggregate(name, n_arg, aggregate_class)
Expand Down Expand Up @@ -871,6 +875,7 @@ Connection objects
FROM test ORDER BY x
""")
print(cur.fetchall())
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -1161,6 +1166,8 @@ Connection objects
src = sqlite3.connect('example.db')
dst = sqlite3.connect(':memory:')
src.backup(dst)
dst.close()
src.close()

.. versionadded:: 3.7

Expand Down Expand Up @@ -1227,6 +1234,10 @@ Connection objects
>>> con.getlimit(sqlite3.SQLITE_LIMIT_ATTACHED)
1

.. testcleanup:: sqlite3.limits

con.close()

.. versionadded:: 3.11

.. _SQLite limit category: https://www.sqlite.org/c3ref/c_limit_attached.html
Expand Down Expand Up @@ -1508,6 +1519,10 @@ Cursor objects
# cur is an sqlite3.Cursor object
cur.executemany("INSERT INTO data VALUES(?)", rows)

.. testcleanup:: sqlite3.cursor

con.close()

.. note::

Any resulting rows are discarded,
Expand Down Expand Up @@ -1613,6 +1628,7 @@ Cursor objects
>>> cur = con.cursor()
>>> cur.connection == con
True
>>> con.close()

.. attribute:: description

Expand Down Expand Up @@ -1733,6 +1749,7 @@ Blob objects
greeting = blob.read()

print(greeting) # outputs "b'Hello, world!'"
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -2045,6 +2062,7 @@ Here's an example of both styles:
params = (1972,)
cur.execute("SELECT * FROM lang WHERE first_appeared = ?", params)
print(cur.fetchall())
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -2103,6 +2121,7 @@ The object passed to *protocol* will be of type :class:`PrepareProtocol`.

cur.execute("SELECT ?", (Point(4.0, -3.2),))
print(cur.fetchone()[0])
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -2133,6 +2152,7 @@ This function can then be registered using :func:`register_adapter`.

cur.execute("SELECT ?", (Point(1.0, 2.5),))
print(cur.fetchone()[0])
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -2217,6 +2237,8 @@ The following example illustrates the implicit and explicit approaches:
cur.execute("INSERT INTO test(p) VALUES(?)", (p,))
cur.execute('SELECT p AS "p [point]" FROM test')
print("with column names:", cur.fetchone()[0])
cur.close()
con.close()

.. testoutput::
:hide:
Expand Down Expand Up @@ -2423,6 +2445,8 @@ Some useful URI tricks include:
res = con2.execute("SELECT data FROM shared")
assert res.fetchone() == (28,)

con1.close()
con2.close()

More information about this feature, including a list of parameters,
can be found in the `SQLite URI documentation`_.
Expand Down Expand Up @@ -2469,6 +2493,7 @@ Queries now return :class:`!Row` objects:
'Earth'
>>> row["RADIUS"] # Column names are case-insensitive.
6378
>>> con.close()

.. note::

Expand All @@ -2495,6 +2520,7 @@ Using it, queries now return a :class:`!dict` instead of a :class:`!tuple`:
>>> for row in con.execute("SELECT 1 AS a, 2 AS b"):
... print(row)
{'a': 1, 'b': 2}
>>> con.close()

The following row factory returns a :term:`named tuple`:

Expand All @@ -2521,6 +2547,7 @@ The following row factory returns a :term:`named tuple`:
1
>>> row.b # Attribute access.
2
>>> con.close()

With some adjustments, the above recipe can be adapted to use a
:class:`~dataclasses.dataclass`, or any other custom class,
Expand Down
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