Opened 9 years ago

Closed 9 years ago

#12746 closed (fixed)

Use key argument in sort calls

Reported by: Martin v. Löwis Owned by: nobody
Component: Uncategorized Version: 1.2-alpha
Severity: Keywords:
Cc: Triage Stage: Ready for checkin
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


Now that Python 2.4 is the minimum supported version, it is possible to replace all comparison functions with key functions. The attached patch does that.

Doing so has two advantages:

  • it may be slightly faster, in particular, if the comparing the key values is faster than calling the cmp function
  • it helps moving Django towards Python 3, which doesn't support the compare function anymore.

With the patch, I don't get any additional failures when testing on trunk.

Attachments (1)

key.diff (5.5 KB) - added by Martin v. Löwis 9 years ago.

Download all attachments as: .zip

Change History (5)

Changed 9 years ago by Martin v. Löwis

Attachment: key.diff added

comment:1 Changed 9 years ago by Alex Gaynor

Triage Stage: UnreviewedReady for checkin

comment:2 Changed 9 years ago by Martin v. Löwis

As this is my first Django contribution, I'm not sure what is supposed to happen next. Notice that I don't have commit privileges, so I couldn't check that in myself.

comment:3 Changed 9 years ago by Karen Tracey has a picture and some description of Django's process. You weren't expected to check it in yourself, Alex setting it ready for checkin is just a way to signal he has reviewed it and thinks it's ready.

comment:4 Changed 9 years ago by Russell Keith-Magee

Resolution: fixed
Status: newclosed

(In [13509]) Fixed #12746 -- Updated sorting calls to use 'key' instead of 'cmp'. This will be slightly faster in certain circumstances, but more importantly, is a required step for migration to Python 3. Thanks to Martin van Loewis for the patch.

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