Some python code that keeps throwing up an invalid syntax error:
stat.sort(lambda x1, y1: 1 if x1.created_at < y1.created_at else -1)
views:
200answers:
2
+1
A:
Try the and-or trick:
lambda x1, y1: x1.created_at < y1.created_at and 1 or -1
kgiannakakis
2009-07-28 14:42:57
The and-or hack is ugly and not necessary anymore. Conditional expressions were introduced precisely to avoid it.
Roberto Bonvallet
2009-07-28 15:06:52
+8
A:
This is a better solution:
stat.sort(key=lambda x: x.created_at, reverse=True)
Or, to avoid the lambda altogether:
from operator import attrgetter
stat.sort(key=attrgetter('created_at'), reverse=True)
Roberto Bonvallet
2009-07-28 15:06:01
+1, that's more readable than my answer, and apparently faster: http://docs.python.org/library/stdtypes.html#typesseq-mutable.
Bastien Léonard
2009-07-28 15:09:07
operator.attrgetter() is definitely an improvement, pythonically speaking.
hughdbrown
2009-07-28 16:06:26