Close #19282: Native context management in dbm

1 files changed, 22 insertions, 16 deletions

diff --git a/Doc/library/dbm.rst b/Doc/library/dbm.rst
index 81a05c7..f5496d5 100644
--- a/Doc/library/dbm.rst
+++ b/Doc/library/dbm.rst
@@ -73,33 +73,39 @@ Key and values are always stored as bytes. This means that when
 strings are used they are implicitly converted to the default encoding before
 being stored.
 
+These objects also support being used in a :keyword:`with` statement, which
+will automatically close them when done.
+
+.. versionchanged:: 3.4
+   Added native support for the context management protocol to the objects
+   returned by :func:`.open`.
+
 The following example records some hostnames and a corresponding title,  and
 then prints out the contents of the database::
 
    import dbm
 
    # Open database, creating it if necessary.
-   db = dbm.open('cache', 'c')
+   with dbm.open('cache', 'c') as db:
 
-   # Record some values
-   db[b'hello'] = b'there'
-   db['www.python.org'] = 'Python Website'
-   db['www.cnn.com'] = 'Cable News Network'
+       # Record some values
+       db[b'hello'] = b'there'
+       db['www.python.org'] = 'Python Website'
+       db['www.cnn.com'] = 'Cable News Network'
 
-   # Note that the keys are considered bytes now.
-   assert db[b'www.python.org'] == b'Python Website'
-   # Notice how the value is now in bytes.
-   assert db['www.cnn.com'] == b'Cable News Network'
+       # Note that the keys are considered bytes now.
+       assert db[b'www.python.org'] == b'Python Website'
+       # Notice how the value is now in bytes.
+       assert db['www.cnn.com'] == b'Cable News Network'
 
-   # Often-used methods of the dict interface work too.
-   print(db.get('python.org', b'not present'))
+       # Often-used methods of the dict interface work too.
+       print(db.get('python.org', b'not present'))
 
-   # Storing a non-string key or value will raise an exception (most
-   # likely a TypeError).
-   db['www.yahoo.com'] = 4
+       # Storing a non-string key or value will raise an exception (most
+       # likely a TypeError).
+       db['www.yahoo.com'] = 4
 
-   # Close when done.
-   db.close()
+   # db is automatically closed when leaving the with statement.
 
 
 .. seealso::