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@ -104,8 +104,8 @@ using a \var{key} parameter. Using \var{key} results in calling the
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\method{lower()} method once for each element in the list while using
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\var{cmp} will call the method twice for each comparison.
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Note, for simple key functions and comparison functions, it is often
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possible to avoid the \keyword{lambda} expression by using an unbound
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For simple key functions and comparison functions, it is often
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possible to avoid a \keyword{lambda} expression by using an unbound
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method instead. For example, the above case-insensitive sort is best
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coded as:
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@ -120,10 +120,11 @@ The \var{reverse} parameter should have a Boolean value. If the value is
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of \code{L.sort(lambda x,y: cmp(y.score, x.score))}, you can now write:
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\code{L.sort(key = lambda x: x.score, reverse=True)}.
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The results of sorting are now guaranteed to be stable. This means that
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two entries with equal keys will be returned in the same order as
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they were input.
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The results of sorting are now guaranteed to be stable. This means
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that two entries with equal keys will be returned in the same order as
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they were input. For example, you can sort a list of people by name,
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and then sort the list by age, resulting in a list sorted by age where
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people with the same age are in name-sorted order.
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\item The list type gained a \method{sorted(iterable)} method that works
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like the in-place \method{sort()} method but has been made suitable for
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@ -143,6 +144,7 @@ use in expressions. The differences are:
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>>> list.sorted('Monte Python') # any iterable may be an input
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[' ', 'M', 'P', 'e', 'h', 'n', 'n', 'o', 'o', 't', 't', 'y']
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>>> colormap = dict(red=1, blue=2, green=3, black=4, yellow=5)
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>>> # Lists the contents of the dict sorted by key values
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>>> for k, v in list.sorted(colormap.iteritems()):
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... print k, v
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...
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@ -293,6 +295,6 @@ changes to your code:
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The author would like to thank the following people for offering
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suggestions, corrections and assistance with various drafts of this
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article: .
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article: Raymond Hettinger.
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\end{document}
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