This is a multi-part message in MIME format. ------=_NextPart_000_0029_01C1DB3D.0B3698E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dan Parisien posted a small feature request about three months ago: = http://sourceforge.net/tracker/index.php?func=3Ddetail&aid=3D495086&group= _id=3D5470&atid=3D355470 The current behavior of popitem is to return and remove an arbitrary = key/value pair from a dictionary. With the optional argument, Dan = proposes that a specific key/value pair be returned and removed. = Without the optional argument, the behavior would be unchanged. I think this is a great idea. Like .get() and .setdefault(), this = provides a fast, explicit alternative to a commonly used series of = dictionary operations. The speed improvement comes from doing a single = lookup for retrieving the item and then deleting it. Like the optional = argument in list.pop(i), the extra ability is added without cluttering = the default case. If we can agree that this should be done and accepted, I'll volunteer to = write the patch. Raymond Hettinger Before -------- value =3D adict[key] del key return (key, value) After ------ return adict.popitem(key) ------=_NextPart_000_0029_01C1DB3D.0B3698E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 5.50.4207.2601" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2> <DIV><FONT face=3DArial size=3D2>Dan Parisien posted a small feature = request about=20 three months ago: <A=20 href=3D"http://sourceforge.net/tracker/index.php?func=3Ddetail&aid=3D= 495086&group_id=3D5470&atid=3D355470">http://sourceforge.net/trac= ker/index.php?func=3Ddetail&aid=3D495086&group_id=3D5470&atid= =3D355470</A></FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>The current behavior of popitem is to = return and=20 remove an arbitrary key/value pair from a dictionary. With = the=20 optional argument, Dan proposes that a specific key/value pair be = returned and=20 removed. Without the optional argument, the behavior would be=20 unchanged.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I think this is a great idea. = Like .get() and=20 .setdefault(), this provides a fast, explicit alternative to a commonly = used=20 series of dictionary operations. The speed improvement comes from = doing a=20 single lookup for retrieving the item and then deleting it. = </FONT><FONT=20 face=3DArial size=3D2>Like the optional argument in list.pop(i), the = extra ability=20 is added without cluttering the default case.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>If we can agree that this should be = done and=20 accepted, I'll volunteer to write the patch.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Raymond Hettinger</FONT></DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV>Before</DIV> <DIV>--------</DIV> <DIV>value =3D adict[key]</DIV> <DIV>del key</DIV> <DIV>return (key, value)</DIV> <DIV> </DIV> <DIV>After</DIV> <DIV>------</DIV> <DIV>return adict.popitem(key)</DIV> <DIV> </DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_0029_01C1DB3D.0B3698E0--
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